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1.22M
79E
79
E
en
E. Security System
<div class="problem-statement"><div class="header"><div class="title">E. Security System</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class=...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="0d5d6336190e01ac375e20820711cc69"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Mathematics including integration, differential equations, etc"]
["math", "*2900"]
https://codeforces.com/blog/entry/1848
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="a95a71adf4d2d06cd0ab65247c5886c2"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
80A
80
A
en
A. Panoramix's Prediction
<div class="problem-statement"><div class="header"><div class="title">A. Panoramix's Prediction</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><di...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="2541336a3a19b474368b286114aa8b9b"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Brute force"]
["brute force", "*800"]
https://codeforces.com/blog/entry/1769
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="0248ba77a5d012cbac764933a1ba82b2"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
80B
80
B
en
B. Depression
<div class="problem-statement"><div class="header"><div class="title">B. Depression</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prop...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="4a8f831bdb8bb238db81b2c1a0c1a9df"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Geometry, computational geometry", "Mathematics including integration, differential equations, etc"]
["geometry", "math", "*1200"]
https://codeforces.com/blog/entry/1769
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="0248ba77a5d012cbac764933a1ba82b2"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
80C
80
C
en
C. Heroes
<div class="problem-statement"><div class="header"><div class="title">C. Heroes</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="aed875cbc7e9110dc613cf0c299135cd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Brute force", "Implementation problems, programming technics, simulation"]
["brute force", "implementation", "*1400"]
https://codeforces.com/blog/entry/1769
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="0248ba77a5d012cbac764933a1ba82b2"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
80D
80
D
en
D. Falling Anvils
<div class="problem-statement"><div class="header"><div class="title">D. Falling Anvils</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class=...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f097f5b15c641a0342df1d0227919aa3"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Geometry, computational geometry", "Probabilities, expected values, statistics, random variables, etc"]
["geometry", "probabilities", "*1800"]
https://codeforces.com/blog/entry/1769
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="0248ba77a5d012cbac764933a1ba82b2"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
80E
80
E
en
E. Beavermuncher-0xFF
<div class="problem-statement"><div class="header"><div class="title">E. Beavermuncher-0xFF</div><div class="time-limit"><div class="property-title">time limit per test</div>3 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div cl...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="bcce1e6e01ad4c088c9d8377239f49ec"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
[]
["*2100"]
https://codeforces.com/blog/entry/1769
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="0248ba77a5d012cbac764933a1ba82b2"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
81A
81
A
en
A. Plug-in
<div class="problem-statement"><div class="header"><div class="title">A. Plug-in</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="4c357c531dd9898446adb1f6cad572fd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation"]
["implementation", "*1400"]
81B
81
B
en
B. Sequence Formatting
<div class="problem-statement"><div class="header"><div class="title">B. Sequence Formatting</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div c...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="6467b7565fbc24fe74373098c5c003a0"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Prefix- and Z-functions, suffix structures, Knuth\u2013Morris\u2013Pratt algorithm, etc"]
["implementation", "strings", "*1700"]
81C
81
C
en
C. Average Score
<div class="problem-statement"><div class="header"><div class="title">C. Average Score</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="97c59f0f5285235672baf7eccb2a1094"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Greedy algorithms", "Mathematics including integration, differential equations, etc", "Sortings, orderings"]
["greedy", "math", "sortings", "*1700"]
81D
81
D
en
D. Polycarp's Picture Gallery
<div class="problem-statement"><div class="header"><div class="title">D. Polycarp's Picture Gallery</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="8c4183a05c8f9ff2689dd8790a05c8fe"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Constructive algorithms", "Greedy algorithms"]
["constructive algorithms", "greedy", "*2100"]
81E
81
E
en
E. Pairs
<div class="problem-statement"><div class="header"><div class="title">E. Pairs</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="acfc031f723cb9fb6df5c2a5c2bc020b"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dfs and similar", "Dynamic programming", "Disjoint set union", "Graphs", "Implementation problems, programming technics, simulation", "Trees"]
["dfs and similar", "dp", "dsu", "graphs", "implementation", "trees", "*2700"]
82A
82
A
en
A. Double Cola
<div class="problem-statement"><div class="header"><div class="title">A. Double Cola</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="pro...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="b8aad609f0f152b572b38b4001684b21"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Mathematics including integration, differential equations, etc"]
["implementation", "math", "*1100"]
https://codeforces.com/blog/entry/1889
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="66878a58d52657dd4185022e63caeb37"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
82B
82
B
en
B. Sets
<div class="problem-statement"><div class="header"><div class="title">B. Sets</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="a028acbe68dc79d1f441405485bc70c1"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Constructive algorithms", "Hashing, hashtables", "Implementation problems, programming technics, simulation"]
["constructive algorithms", "hashing", "implementation", "*1700"]
https://codeforces.com/blog/entry/1889
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="66878a58d52657dd4185022e63caeb37"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
82C
82
C
en
C. General Mobilization
<div class="problem-statement"><div class="header"><div class="title">C. General Mobilization</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div ...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="3471969736f1337eebf364be8643431e"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Heaps, binary search trees, segment trees, hash tables, etc", "Dfs and similar", "Sortings, orderings"]
["data structures", "dfs and similar", "sortings", "*2000"]
https://codeforces.com/blog/entry/1889
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="66878a58d52657dd4185022e63caeb37"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
82D
82
D
en
D. Two out of Three
<div class="problem-statement"><div class="header"><div class="title">D. Two out of Three</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div clas...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="679469accc463f95e069e2f0ced4d432"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dynamic programming"]
["dp", "*2000"]
https://codeforces.com/blog/entry/1889
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="66878a58d52657dd4185022e63caeb37"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
82E
82
E
en
E. Corridor
<div class="problem-statement"><div class="header"><div class="title">E. Corridor</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prope...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="0dba1e34c50ec02d6ca4acb15b9cb7fc"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Geometry, computational geometry"]
["geometry", "*2600"]
https://codeforces.com/blog/entry/1889
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="66878a58d52657dd4185022e63caeb37"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
83A
83
A
en
A. Magical Array
<div class="problem-statement"><div class="header"><div class="title">A. Magical Array</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="27fdcc78bbf3ab1e075560ed7c57eda4"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Mathematics including integration, differential equations, etc"]
["math", "*1300"]
83B
83
B
en
B. Doctor
<div class="problem-statement"><div class="header"><div class="title">B. Doctor</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="c7189ab1910ab02d8d91930316665895"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Binary search", "Mathematics including integration, differential equations, etc", "Sortings, orderings"]
["binary search", "math", "sortings", "*1800"]
83C
83
C
en
C. Track
<div class="problem-statement"><div class="header"><div class="title">C. Track</div><div class="time-limit"><div class="property-title">time limit per test</div>5 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="633ba0683f77f1019bc018326c13ba11"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Graphs", "Greedy algorithms", "Shortest paths on weighted and unweighted graphs"]
["graphs", "greedy", "shortest paths", "*2400"]
83D
83
D
en
D. Numbers
<div class="problem-statement"><div class="header"><div class="title">D. Numbers</div><div class="time-limit"><div class="property-title">time limit per test</div>3 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="proper...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="a66398d7e7ba2d35799a2b37d82109d3"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dynamic programming", "Mathematics including integration, differential equations, etc", "Number theory: Euler function, GCD, divisibility, etc"]
["dp", "math", "number theory", "*2400"]
83E
83
E
en
E. Two Subsequences
<div class="problem-statement"><div class="header"><div class="title">E. Two Subsequences</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div clas...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="e9ade63b6b00c5aead9b21659d7c084d"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Bitmasks", "Dynamic programming"]
["bitmasks", "dp", "*2800"]
84A
84
A
en
A. Toy Army
<div class="problem-statement"><div class="header"><div class="title">A. Toy Army</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prope...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="c0b6f53f4aa54a9d5e1411d49a6f340b"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Mathematics including integration, differential equations, etc", "Number theory: Euler function, GCD, divisibility, etc"]
["math", "number theory", "*900"]
84B
84
B
en
B. Magical Array
<div class="problem-statement"><div class="header"><div class="title">B. Magical Array</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ef15e8385da47284d439d7bf74ea371c"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Combinatorics", "Implementation problems, programming technics, simulation"]
["combinatorics", "implementation", "*1300"]
84C
84
C
en
C. Biathlon
<div class="problem-statement"><div class="header"><div class="title">C. Biathlon</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="proper...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="d383c77f39811875e91c2822e7fc18d0"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Binary search", "Implementation problems, programming technics, simulation"]
["binary search", "implementation", "*1700"]
84D
84
D
en
D. Doctor
<div class="problem-statement"><div class="header"><div class="title">D. Doctor</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="1a72ddb508152b03858ebca6983f7d24"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Binary search", "Implementation problems, programming technics, simulation"]
["binary search", "implementation", "*1800"]
84E
84
E
en
E. Track
<div class="problem-statement"><div class="header"><div class="title">E. Track</div><div class="time-limit"><div class="property-title">time limit per test</div>5 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9f803caff9ec7852140d090d563bdc2"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Brute force", "Shortest paths on weighted and unweighted graphs"]
["brute force", "shortest paths", "*2400"]
85A
85
A
en
A. Domino
<div class="problem-statement"><div class="header"><div class="title">A. Domino</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="6248e23ac0bd38147e182de9cd131152"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Constructive algorithms", "Implementation problems, programming technics, simulation"]
["constructive algorithms", "implementation", "*1300"]
https://codeforces.com/blog/entry/2020
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="212c74d22cb02e0bd0e744451ae888a7"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
85B
85
B
en
B. Embassy Queue
<div class="problem-statement"><div class="header"><div class="title">B. Embassy Queue</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="af09799f91be2f871f6697a6d7f1bd69"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Heaps, binary search trees, segment trees, hash tables, etc", "Greedy algorithms"]
["data structures", "greedy", "*1800"]
https://codeforces.com/blog/entry/2020
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="212c74d22cb02e0bd0e744451ae888a7"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
85C
85
C
en
C. Petya and Tree
<div class="problem-statement"><div class="header"><div class="title">C. Petya and Tree</div><div class="time-limit"><div class="property-title">time limit per test</div>3 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class=...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="cd47a7ab150e5c7bbf3e61d9d2cfeb83"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Binary search", "Dfs and similar", "Probabilities, expected values, statistics, random variables, etc", "Sortings, orderings", "Trees"]
["binary search", "dfs and similar", "probabilities", "sortings", "trees", "*2200"]
https://codeforces.com/blog/entry/2020
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="212c74d22cb02e0bd0e744451ae888a7"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
85D
85
D
en
D. Sum of Medians
<div class="problem-statement"><div class="header"><div class="title">D. Sum of Medians</div><div class="time-limit"><div class="property-title">time limit per test</div>3 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class=...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="34eedeb6bdbbc03b1730870edb62caab"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Binary search", "Brute force", "Heaps, binary search trees, segment trees, hash tables, etc", "Implementation problems, programming technics, simulation"]
["binary search", "brute force", "data structures", "implementation", "*2300"]
https://codeforces.com/blog/entry/2020
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="212c74d22cb02e0bd0e744451ae888a7"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
85E
85
E
en
E. Guard Towers
<div class="problem-statement"><div class="header"><div class="title">E. Guard Towers</div><div class="time-limit"><div class="property-title">time limit per test</div>1.5 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class=...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="dc53709de2fe155fd8e8abf5763bc96f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Binary search", "Disjoint set union", "Geometry, computational geometry", "Graphs", "Sortings, orderings"]
["binary search", "dsu", "geometry", "graphs", "sortings", "*2600"]
https://codeforces.com/blog/entry/2020
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="212c74d22cb02e0bd0e744451ae888a7"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
86A
86
A
en
A. Reflection
<div class="problem-statement"><div class="header"><div class="title">A. Reflection</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="pro...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="3580ca1d89a40d7491247bc22a3082f0"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Mathematics including integration, differential equations, etc"]
["math", "*1600"]
https://codeforces.com/blog/entry/2028
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="3954927d6e17aef36fa48aaaf888de50"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
86B
86
B
en
B. Tetris revisited
<div class="problem-statement"><div class="header"><div class="title">B. Tetris revisited</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="3326ef13b338a0537bd9b83a1a8734b4"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Constructive algorithms", "Graph matchings, K\u00f6nig's theorem, vertex cover of bipartite graph", "Greedy algorithms", "Mathematics including integration, differential equations, etc"]
["constructive algorithms", "graph matchings", "greedy", "math", "*2200"]
https://codeforces.com/blog/entry/2028
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="3954927d6e17aef36fa48aaaf888de50"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
86C
86
C
en
C. Genetic engineering
<div class="problem-statement"><div class="header"><div class="title">C. Genetic engineering</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div c...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="4931a0c0c9dcacab5dda45b7f40631ec"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dynamic programming", "Suffix arrays, suffix trees, suffix automatas, etc", "Trees"]
["dp", "string suffix structures", "trees", "*2500"]
https://codeforces.com/blog/entry/2028
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="3954927d6e17aef36fa48aaaf888de50"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
86D
86
D
en
D. Powerful array
<div class="problem-statement"><div class="header"><div class="title">D. Powerful array</div><div class="time-limit"><div class="property-title">time limit per test</div>5 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class=...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="28c963faed4c7f0071f8cdedaa6988b0"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Heaps, binary search trees, segment trees, hash tables, etc", "Implementation problems, programming technics, simulation", "Mathematics including integration, differential equations, etc", "Two pointers"]
["data structures", "implementation", "math", "two pointers", "*2200"]
https://codeforces.com/blog/entry/2028
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="3954927d6e17aef36fa48aaaf888de50"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
86E
86
E
en
E. Long sequence
<div class="problem-statement"><div class="header"><div class="title">E. Long sequence</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="4d95c0afd4a4673434109bdd17c1db2e"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Brute force", "Mathematics including integration, differential equations, etc", "Matrix multiplication, determinant, Cramer's rule, systems of linear equations"]
["brute force", "math", "matrices", "*2700"]
https://codeforces.com/blog/entry/2028
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="3954927d6e17aef36fa48aaaf888de50"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
87A
87
A
en
A. Trains
<div class="problem-statement"><div class="header"><div class="title">A. Trains</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="70f6140dddba69efd3e9872d267229ad"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Mathematics including integration, differential equations, etc"]
["implementation", "math", "*1500"]
https://codeforces.com/blog/entry/2121
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ebe580dd9252daf7b576e143492e5c0a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
87B
87
B
en
B. Vasya and Types
<div class="problem-statement"><div class="header"><div class="title">B. Vasya and Types</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ec401f2041e35a8a7625d22c570d6cf4"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Prefix- and Z-functions, suffix structures, Knuth\u2013Morris\u2013Pratt algorithm, etc"]
["implementation", "strings", "*1800"]
https://codeforces.com/blog/entry/2121
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ebe580dd9252daf7b576e143492e5c0a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
87C
87
C
en
C. Interesting Game
<div class="problem-statement"><div class="header"><div class="title">C. Interesting Game</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div clas...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="e2974f99926c8228eed533dd542ea98c"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dynamic programming", "Games, Sprague\u2013Grundy theorem", "Mathematics including integration, differential equations, etc"]
["dp", "games", "math", "*2000"]
https://codeforces.com/blog/entry/2121
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ebe580dd9252daf7b576e143492e5c0a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
87D
87
D
en
D. Beautiful Road
<div class="problem-statement"><div class="header"><div class="title">D. Beautiful Road</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="252ccdef4d127cb18f52e25a9c577b4e"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dfs and similar", "Dynamic programming", "Disjoint set union", "Graphs", "Implementation problems, programming technics, simulation", "Sortings, orderings", "Trees"]
["dfs and similar", "dp", "dsu", "graphs", "implementation", "sortings", "trees", "*2300"]
https://codeforces.com/blog/entry/2121
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ebe580dd9252daf7b576e143492e5c0a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
87E
87
E
en
E. Mogohu-Rea Idol
<div class="problem-statement"><div class="header"><div class="title">E. Mogohu-Rea Idol</div><div class="time-limit"><div class="property-title">time limit per test</div>3 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="2d25a5116e7a3ac6fe502077adebdda6"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Geometry, computational geometry"]
["geometry", "*2600"]
https://codeforces.com/blog/entry/2121
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ebe580dd9252daf7b576e143492e5c0a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
88A
88
A
en
A. Chord
<div class="problem-statement"><div class="header"><div class="title">A. Chord</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="c154c97c5d943f4a9b4bb09be2fa19d8"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Brute force", "Implementation problems, programming technics, simulation"]
["brute force", "implementation", "*1200"]
https://codeforces.com/blog/entry/2121
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ebe580dd9252daf7b576e143492e5c0a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
88B
88
B
en
B. Keyboard
<div class="problem-statement"><div class="header"><div class="title">B. Keyboard</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="proper...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="263bcfe2b1633ece6943d2c273bc5699"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation"]
["implementation", "*1500"]
https://codeforces.com/blog/entry/2121
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ebe580dd9252daf7b576e143492e5c0a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
88C
88
C
en
C. Trains
<div class="problem-statement"><div class="header"><div class="title">C. Trains</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="b9a0937db9b71d34cbe8f44d4b602276"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Mathematics including integration, differential equations, etc", "Number theory: Euler function, GCD, divisibility, etc"]
["implementation", "math", "number theory", "*1500"]
https://codeforces.com/blog/entry/2121
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ebe580dd9252daf7b576e143492e5c0a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
88D
88
D
en
D. Vasya and Types
<div class="problem-statement"><div class="header"><div class="title">D. Vasya and Types</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="6c9bf498d580780d9f94188a73a424e1"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation"]
["implementation", "*1800"]
https://codeforces.com/blog/entry/2121
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ebe580dd9252daf7b576e143492e5c0a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
88E
88
E
en
E. Interesting Game
<div class="problem-statement"><div class="header"><div class="title">E. Interesting Game</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div clas...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9bd5875a042cffb4282d0ea47c3aa6b"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
[]
["*2000"]
https://codeforces.com/blog/entry/2121
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ebe580dd9252daf7b576e143492e5c0a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
89A
89
A
en
A. Robbery
<div class="problem-statement"><div class="header"><div class="title">A. Robbery</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="c4637abbcaa654c5c8959834648569e9"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Greedy algorithms"]
["greedy", "*1800"]
https://codeforces.com/blog/entry/2162
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9dc0e833c632d98354793375653f5fd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
89B
89
B
en
B. Widget Library
<div class="problem-statement"><div class="header"><div class="title">B. Widget Library</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class=...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="2c719982898fe67e9ed8808bbc4bc325"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dynamic programming", "Parsing expression grammar", "Graphs", "Implementation problems, programming technics, simulation"]
["dp", "expression parsing", "graphs", "implementation", "*2300"]
https://codeforces.com/blog/entry/2162
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9dc0e833c632d98354793375653f5fd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
89C
89
C
en
C. Chip Play
<div class="problem-statement"><div class="header"><div class="title">C. Chip Play</div><div class="time-limit"><div class="property-title">time limit per test</div>4 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prop...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="9727a03305c5a8e8dbed44ba16564899"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Brute force", "Heaps, binary search trees, segment trees, hash tables, etc", "Implementation problems, programming technics, simulation"]
["brute force", "data structures", "implementation", "*2300"]
https://codeforces.com/blog/entry/2162
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9dc0e833c632d98354793375653f5fd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
89D
89
D
en
D. Space mines
<div class="problem-statement"><div class="header"><div class="title">D. Space mines</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="pr...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="720be669ac4d7a54a8e0993746c1612c"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Geometry, computational geometry"]
["geometry", "*2500"]
https://codeforces.com/blog/entry/2162
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9dc0e833c632d98354793375653f5fd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
89E
89
E
en
E. Fire and Ice
<div class="problem-statement"><div class="header"><div class="title">E. Fire and Ice</div><div class="time-limit"><div class="property-title">time limit per test</div>0.5 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="2cb52a336c3469a79ca7ca54e92f681a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Greedy algorithms"]
["greedy", "*2900"]
https://codeforces.com/blog/entry/2162
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9dc0e833c632d98354793375653f5fd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
90A
90
A
en
A. Cableway
<div class="problem-statement"><div class="header"><div class="title">A. Cableway</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prope...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="d8d1dd5f447927ae866a178053542dbf"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Greedy algorithms", "Mathematics including integration, differential equations, etc"]
["greedy", "math", "*1000"]
https://codeforces.com/blog/entry/2162
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9dc0e833c632d98354793375653f5fd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
90B
90
B
en
B. African Crossword
<div class="problem-statement"><div class="header"><div class="title">B. African Crossword</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div cla...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="fbbd274f0cc02d41f909fcc070d244e5"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Prefix- and Z-functions, suffix structures, Knuth\u2013Morris\u2013Pratt algorithm, etc"]
["implementation", "strings", "*1100"]
https://codeforces.com/blog/entry/2162
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9dc0e833c632d98354793375653f5fd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
90C
90
C
en
C. Robbery
<div class="problem-statement"><div class="header"><div class="title">C. Robbery</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="b4d450afba4765c9b9e602749e3e02c9"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Greedy algorithms", "Mathematics including integration, differential equations, etc"]
["greedy", "math", "*1800"]
https://codeforces.com/blog/entry/2162
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9dc0e833c632d98354793375653f5fd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
90D
90
D
en
D. Widget Library
<div class="problem-statement"><div class="header"><div class="title">D. Widget Library</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class=...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="5a4664b78849b2c4f4425a63ded1c3d6"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
[]
["*2300"]
https://codeforces.com/blog/entry/2162
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9dc0e833c632d98354793375653f5fd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
90E
90
E
en
E. Chip Play
<div class="problem-statement"><div class="header"><div class="title">E. Chip Play</div><div class="time-limit"><div class="property-title">time limit per test</div>4 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prop...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="87110361114a6ad52140cd30df9db1c8"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
[]
["*2300"]
https://codeforces.com/blog/entry/2162
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f9dc0e833c632d98354793375653f5fd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
91A
91
A
en
A. Newspaper Headline
<div class="problem-statement"><div class="header"><div class="title">A. Newspaper Headline</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div cl...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="039afdc970ec0653a83c7d6bae4252bf"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Greedy algorithms", "Prefix- and Z-functions, suffix structures, Knuth\u2013Morris\u2013Pratt algorithm, etc"]
["greedy", "strings", "*1500"]
https://codeforces.com/blog/entry/2182
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f2f83b648f196b03aa1a03b3c623e68f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
91B
91
B
en
B. Queue
<div class="problem-statement"><div class="header"><div class="title">B. Queue</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="984c7d118ff66d48053788addf417627"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Binary search", "Heaps, binary search trees, segment trees, hash tables, etc"]
["binary search", "data structures", "*1500"]
https://codeforces.com/blog/entry/2182
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f2f83b648f196b03aa1a03b3c623e68f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
91C
91
C
en
C. Ski Base
<div class="problem-statement"><div class="header"><div class="title">C. Ski Base</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prope...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="91418cbae868db5edeb4bab809fbf70b"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Combinatorics", "Disjoint set union", "Graphs"]
["combinatorics", "dsu", "graphs", "*2300"]
https://codeforces.com/blog/entry/2182
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f2f83b648f196b03aa1a03b3c623e68f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
91D
91
D
en
D. Grocer's Problem
<div class="problem-statement"><div class="header"><div class="title">D. Grocer's Problem</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div clas...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="a11ed4ffa2291c4f3f1e6431d5c4122c"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Constructive algorithms", "Graphs", "Greedy algorithms"]
["constructive algorithms", "graphs", "greedy", "*2600"]
https://codeforces.com/blog/entry/2182
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f2f83b648f196b03aa1a03b3c623e68f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
91E
91
E
en
E. Igloo Skyscraper
<div class="problem-statement"><div class="header"><div class="title">E. Igloo Skyscraper</div><div class="time-limit"><div class="property-title">time limit per test</div>3 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div clas...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="e3347125c800f73d1dce016869a28493"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Heaps, binary search trees, segment trees, hash tables, etc", "Geometry, computational geometry"]
["data structures", "geometry", "*2500"]
https://codeforces.com/blog/entry/2182
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f2f83b648f196b03aa1a03b3c623e68f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
92A
92
A
en
A. Chips
<div class="problem-statement"><div class="header"><div class="title">A. Chips</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="b9ccda1d58ee17372842b1eea43d861f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Mathematics including integration, differential equations, etc"]
["implementation", "math", "*800"]
https://codeforces.com/blog/entry/2182
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f2f83b648f196b03aa1a03b3c623e68f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
92B
92
B
en
B. Binary Number
<div class="problem-statement"><div class="header"><div class="title">B. Binary Number</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="p...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ee4bd30ff269c9b27fe3f7d4fb9d90e0"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Greedy algorithms"]
["greedy", "*1300"]
https://codeforces.com/blog/entry/2182
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f2f83b648f196b03aa1a03b3c623e68f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
92C
92
C
en
C. Newspaper Headline
<div class="problem-statement"><div class="header"><div class="title">C. Newspaper Headline</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div cl...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="1061b31f7f3be9c311fa817e39d4e938"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Binary search", "Heaps, binary search trees, segment trees, hash tables, etc", "Dynamic programming", "Greedy algorithms"]
["binary search", "data structures", "dp", "greedy", "*1500"]
https://codeforces.com/blog/entry/2182
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f2f83b648f196b03aa1a03b3c623e68f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
92D
92
D
en
D. Queue
<div class="problem-statement"><div class="header"><div class="title">D. Queue</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="a8e7a3e818fbfe605c62f1092cc9dca0"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Binary search", "Heaps, binary search trees, segment trees, hash tables, etc", "Dynamic programming"]
["binary search", "data structures", "dp", "*1500"]
https://codeforces.com/blog/entry/2182
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f2f83b648f196b03aa1a03b3c623e68f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
92E
92
E
en
E. Ski Base
<div class="problem-statement"><div class="header"><div class="title">E. Ski Base</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prope...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="60e4adbe3323bc37f7a4327e27a38cac"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Heaps, binary search trees, segment trees, hash tables, etc", "Disjoint set union", "Graphs"]
["data structures", "dsu", "graphs", "*2300"]
https://codeforces.com/blog/entry/2182
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f2f83b648f196b03aa1a03b3c623e68f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
93A
93
A
en
A. Frames
<div class="problem-statement"><div class="header"><div class="title">A. Frames</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="46fee07dfab61cbd2acb5683556b41ec"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation"]
["implementation", "*1700"]
https://codeforces.com/blog/entry/2216
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="60c8b285cd60ff6952ff887ffbc7fb6a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
93B
93
B
en
B. End of Exams
<div class="problem-statement"><div class="header"><div class="title">B. End of Exams</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="pr...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="cad8567c26f5104c9021c4f2783628cf"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Greedy algorithms"]
["greedy", "*1900"]
https://codeforces.com/blog/entry/2216
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="60c8b285cd60ff6952ff887ffbc7fb6a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
93C
93
C
en
C. Azembler
<div class="problem-statement"><div class="header"><div class="title">C. Azembler</div><div class="time-limit"><div class="property-title">time limit per test</div>5 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prope...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="ea42ece3dcd89a9bcaab5b881552e5d2"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Brute force", "Implementation problems, programming technics, simulation"]
["brute force", "implementation", "*2500"]
https://codeforces.com/blog/entry/2216
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="60c8b285cd60ff6952ff887ffbc7fb6a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
93D
93
D
en
D. Flags
<div class="problem-statement"><div class="header"><div class="title">D. Flags</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="07044989fa96f0558e9e3b0d35065d8a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dynamic programming", "Mathematics including integration, differential equations, etc", "Matrix multiplication, determinant, Cramer's rule, systems of linear equations"]
["dp", "math", "matrices", "*2500"]
https://codeforces.com/blog/entry/2216
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="60c8b285cd60ff6952ff887ffbc7fb6a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
93E
93
E
en
E. Lostborn
<div class="problem-statement"><div class="header"><div class="title">E. Lostborn</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prope...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="6946524251e204f92d864a34507e26be"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dynamic programming", "Mathematics including integration, differential equations, etc", "Number theory: Euler function, GCD, divisibility, etc"]
["dp", "math", "number theory", "*2600"]
https://codeforces.com/blog/entry/2216
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="60c8b285cd60ff6952ff887ffbc7fb6a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
94A
94
A
en
A. Restoring Password
<div class="problem-statement"><div class="header"><div class="title">A. Restoring Password</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div cl...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="fd396b620528891bec6c84d126c7b800"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Prefix- and Z-functions, suffix structures, Knuth\u2013Morris\u2013Pratt algorithm, etc"]
["implementation", "strings", "*900"]
https://codeforces.com/blog/entry/2208
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="9e1674da8a15065f22d781332bfaa056"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
94B
94
B
en
B. Friends
<div class="problem-statement"><div class="header"><div class="title">B. Friends</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="6ba8363966e6850b0fe8890f0eb750a0"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Graphs", "Implementation problems, programming technics, simulation", "Mathematics including integration, differential equations, etc"]
["graphs", "implementation", "math", "*1300"]
https://codeforces.com/blog/entry/2208
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="9e1674da8a15065f22d781332bfaa056"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
94C
94
C
en
C. Frames
<div class="problem-statement"><div class="header"><div class="title">C. Frames</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="fea74126f7dfc77b4c62df8086ad68e5"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Mathematics including integration, differential equations, etc"]
["math", "*1700"]
https://codeforces.com/blog/entry/2208
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="9e1674da8a15065f22d781332bfaa056"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
94D
94
D
en
D. End of Exams
<div class="problem-statement"><div class="header"><div class="title">D. End of Exams</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="pr...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="59c9de6be3c2c1667019f4049f77c05f"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Greedy algorithms", "Mathematics including integration, differential equations, etc"]
["greedy", "math", "*1900"]
https://codeforces.com/blog/entry/2208
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="9e1674da8a15065f22d781332bfaa056"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
94E
94
E
en
E. Azembler
<div class="problem-statement"><div class="header"><div class="title">E. Azembler</div><div class="time-limit"><div class="property-title">time limit per test</div>5 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prope...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="46aa8afe35282e4782771c677dfec157"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Brute force"]
["brute force", "*2500"]
https://codeforces.com/blog/entry/2208
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="9e1674da8a15065f22d781332bfaa056"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
95A
95
A
en
A. Hockey
<div class="problem-statement"><div class="header"><div class="title">A. Hockey</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="a5e3a396d3a8572e5361508a8f49d830"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Prefix- and Z-functions, suffix structures, Knuth\u2013Morris\u2013Pratt algorithm, etc"]
["implementation", "strings", "*1600"]
https://codeforces.com/blog/entry/2257
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="32e69b28e09defa8c38321668768be83"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
95B
95
B
en
B. Lucky Numbers
<div class="problem-statement"><div class="header"><div class="title">B. Lucky Numbers</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="701bef642184b52246f1e54371d1dffd"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dynamic programming", "Greedy algorithms"]
["dp", "greedy", "*1800"]
https://codeforces.com/blog/entry/2257
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="32e69b28e09defa8c38321668768be83"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
95C
95
C
en
C. Volleyball
<div class="problem-statement"><div class="header"><div class="title">C. Volleyball</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="pro...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="a8922abf6fb3bde6d480636441dd58b4"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Shortest paths on weighted and unweighted graphs"]
["shortest paths", "*1900"]
https://codeforces.com/blog/entry/2257
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="32e69b28e09defa8c38321668768be83"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
95D
95
D
en
D. Horse Races
<div class="problem-statement"><div class="header"><div class="title">D. Horse Races</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="pr...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="3eddec0f88be5c191a06e4f53368af0a"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dynamic programming", "Mathematics including integration, differential equations, etc"]
["dp", "math", "*2500"]
https://codeforces.com/blog/entry/2257
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="32e69b28e09defa8c38321668768be83"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
95E
95
E
en
E. Lucky Country
<div class="problem-statement"><div class="header"><div class="title">E. Lucky Country</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="p...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="e0f6e3ff79702471f0262d9e47a9d9de"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dynamic programming", "Disjoint set union", "Graphs"]
["dp", "dsu", "graphs", "*2500"]
https://codeforces.com/blog/entry/2257
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="32e69b28e09defa8c38321668768be83"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
96A
96
A
en
A. Football
<div class="problem-statement"><div class="header"><div class="title">A. Football</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prope...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="dab6b0e04a7920d0e86069b0416ce626"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Prefix- and Z-functions, suffix structures, Knuth\u2013Morris\u2013Pratt algorithm, etc"]
["implementation", "strings", "*900"]
https://codeforces.com/blog/entry/2257
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="32e69b28e09defa8c38321668768be83"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
96B
96
B
en
B. Lucky Numbers (easy)
<div class="problem-statement"><div class="header"><div class="title">B. Lucky Numbers (easy)</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div ...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="4dca582d08aa5146407edb23906a0f1c"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Binary search", "Bitmasks", "Brute force"]
["binary search", "bitmasks", "brute force", "*1300"]
https://codeforces.com/blog/entry/2257
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="32e69b28e09defa8c38321668768be83"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
96C
96
C
en
C. Hockey
<div class="problem-statement"><div class="header"><div class="title">C. Hockey</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="propert...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="620aa3a47155cc7df306c09969b34560"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Prefix- and Z-functions, suffix structures, Knuth\u2013Morris\u2013Pratt algorithm, etc"]
["implementation", "strings", "*1600"]
https://codeforces.com/blog/entry/2257
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="32e69b28e09defa8c38321668768be83"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
96D
96
D
en
D. Volleyball
<div class="problem-statement"><div class="header"><div class="title">D. Volleyball</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="pro...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="d3e80db80710733fc51ee3081522b915"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Graphs", "Shortest paths on weighted and unweighted graphs"]
["graphs", "shortest paths", "*1900"]
https://codeforces.com/blog/entry/2257
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="32e69b28e09defa8c38321668768be83"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
96E
96
E
en
E. Horse Races
<div class="problem-statement"><div class="header"><div class="title">E. Horse Races</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="pr...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="dcaa90592b8c5ac0d834f673df6e79e9"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
[]
["*2500"]
https://codeforces.com/blog/entry/2257
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="32e69b28e09defa8c38321668768be83"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
97A
97
A
en
A. Domino
<div class="problem-statement"><div class="header"><div class="title">A. Domino</div><div class="time-limit"><div class="property-title">time limit per test</div>0.5 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="proper...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="072c876eb2b52a2adba187e5acf99747"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Brute force", "Implementation problems, programming technics, simulation"]
["brute force", "implementation", "*2400"]
https://codeforces.com/blog/entry/2293
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="8a5096d6dfcbb41ad204b06489b2c1d8"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
97B
97
B
en
B. Superset
<div class="problem-statement"><div class="header"><div class="title">B. Superset</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prope...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="0ad39ac846eee93446bcf2ccb54255c0"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Constructive algorithms", "Divide and Conquer"]
["constructive algorithms", "divide and conquer", "*2300"]
https://codeforces.com/blog/entry/2293
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="8a5096d6dfcbb41ad204b06489b2c1d8"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
97C
97
C
en
C. Winning Strategy
<div class="problem-statement"><div class="header"><div class="title">C. Winning Strategy</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div clas...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="1b803c3dbc5d6365d02aa0631eb444c1"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Binary search", "Graphs", "Mathematics including integration, differential equations, etc", "Shortest paths on weighted and unweighted graphs"]
["binary search", "graphs", "math", "shortest paths", "*2400"]
https://codeforces.com/blog/entry/2293
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="8a5096d6dfcbb41ad204b06489b2c1d8"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
97D
97
D
en
D. Robot in Basement
<div class="problem-statement"><div class="header"><div class="title">D. Robot in Basement</div><div class="time-limit"><div class="property-title">time limit per test</div>4 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div cla...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="9b95eb60a13e58ce90ad43c3473ac760"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Bitmasks", "Brute force", "Implementation problems, programming technics, simulation"]
["bitmasks", "brute force", "implementation", "*2700"]
https://codeforces.com/blog/entry/2293
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="8a5096d6dfcbb41ad204b06489b2c1d8"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
97E
97
E
en
E. Leaders
<div class="problem-statement"><div class="header"><div class="title">E. Leaders</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="proper...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f4b0a4ba903962133556a87e701487d6"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dfs and similar", "Disjoint set union", "Graphs", "Trees"]
["dfs and similar", "dsu", "graphs", "trees", "*2200"]
https://codeforces.com/blog/entry/2293
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="8a5096d6dfcbb41ad204b06489b2c1d8"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
98A
98
A
en
A. Help Victoria the Wise
<div class="problem-statement"><div class="header"><div class="title">A. Help Victoria the Wise</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="e12d0f247cb44ab6a02aba8b5ff32c02"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Brute force", "Implementation problems, programming technics, simulation"]
["brute force", "implementation", "*1700"]
https://codeforces.com/blog/entry/2323
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="5aa7a64b4b7582355ff8586959da5d94"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
98B
98
B
en
B. Help King
<div class="problem-statement"><div class="header"><div class="title">B. Help King</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prop...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="f43af703644140867552d1202a38f3ef"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Probabilities, expected values, statistics, random variables, etc", "Trees"]
["implementation", "probabilities", "trees", "*2200"]
https://codeforces.com/blog/entry/2323
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="5aa7a64b4b7582355ff8586959da5d94"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
98C
98
C
en
C. Help Greg the Dwarf
<div class="problem-statement"><div class="header"><div class="title">C. Help Greg the Dwarf</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div c...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="c895421c8de9922923f5f6079c617adc"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Geometry, computational geometry", "Ternary search"]
["geometry", "ternary search", "*2500"]
https://codeforces.com/blog/entry/2323
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="5aa7a64b4b7582355ff8586959da5d94"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
98D
98
D
en
D. Help Monks
<div class="problem-statement"><div class="header"><div class="title">D. Help Monks</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="pro...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="c06b8e83b05f38f03ffa1fbea589dd0e"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Constructive algorithms"]
["constructive algorithms", "*2500"]
https://codeforces.com/blog/entry/2323
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="5aa7a64b4b7582355ff8586959da5d94"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
98E
98
E
en
E. Help Shrek and Donkey
<div class="problem-statement"><div class="header"><div class="title">E. Help Shrek and Donkey</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="2fab233b4e37668e9c1354ee2a8561fa"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Dynamic programming", "Games, Sprague\u2013Grundy theorem", "Mathematics including integration, differential equations, etc", "Probabilities, expected values, statistics, random variables, etc"]
["dp", "games", "math", "probabilities", "*2700"]
https://codeforces.com/blog/entry/2323
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="5aa7a64b4b7582355ff8586959da5d94"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
99A
99
A
en
A. Help Far Away Kingdom
<div class="problem-statement"><div class="header"><div class="title">A. Help Far Away Kingdom</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="9b1f48e8d5b228269e000089690e8f3e"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Prefix- and Z-functions, suffix structures, Knuth\u2013Morris\u2013Pratt algorithm, etc"]
["strings", "*800"]
https://codeforces.com/blog/entry/2326
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="92b87381308583317ab1a4d6008f39c4"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
99B
99
B
en
B. Help Chef Gerasim
<div class="problem-statement"><div class="header"><div class="title">B. Help Chef Gerasim</div><div class="time-limit"><div class="property-title">time limit per test</div>0.5 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div cl...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="cee02cc949e75ada95773aaf6ace553b"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Implementation problems, programming technics, simulation", "Sortings, orderings"]
["implementation", "sortings", "*1300"]
https://codeforces.com/blog/entry/2326
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="92b87381308583317ab1a4d6008f39c4"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
99C
99
C
en
C. Help Victoria the Wise
<div class="problem-statement"><div class="header"><div class="title">C. Help Victoria the Wise</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="483fa60a19fa5a49f7894ebf0c903b92"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
["Brute force"]
["brute force", "*1700"]
https://codeforces.com/blog/entry/2326
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="92b87381308583317ab1a4d6008f39c4"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
99D
99
D
en
D. Help King
<div class="problem-statement"><div class="header"><div class="title">D. Help King</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="prop...
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="3e4a5f0ab136ffe0a54e91416c1d0a98"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...
[]
["*2200"]
https://codeforces.com/blog/entry/2326
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"> <html lang="en"> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <meta name="X-Csrf-Token" content="92b87381308583317ab1a4d6008f39c4"/> <meta id="viewport" name="viewport" content="width=device-width, initial-scale=0.01"/> ...