message stringlengths 2 22.8k | message_type stringclasses 2
values | message_id int64 0 1 | conversation_id int64 16 109k | cluster float64 1 1 | __index_level_0__ int64 32 217k |
|---|---|---|---|---|---|
Provide tags and a correct Python 3 solution for this coding contest problem.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e. at the first minute the train is at the point ... | instruction | 0 | 58,852 | 1 | 117,704 |
Tags: math
Correct Solution:
```
from sys import stdin
all_in = stdin.readlines()
t = int(all_in[0])
Lvlr = list(map(lambda x: tuple(map(int, x.split())), all_in[1:]))
ans = list()
for L, v, l, r in Lvlr:
ans.append(L // v - r // v + (l - 1) // v)
print('\n'.join(map(str, ans)))
``` | output | 1 | 58,852 | 1 | 117,705 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e. at the first minute the train is at the point ... | instruction | 0 | 58,853 | 1 | 117,706 |
Tags: math
Correct Solution:
```
import math
for i in range(int(input())):
a,b,c,d=map(int,input().split())
print(a//b-math.floor(d/b)+math.ceil(c/b)-1)
``` | output | 1 | 58,853 | 1 | 117,707 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e. at the first minute the train is at the point ... | instruction | 0 | 58,854 | 1 | 117,708 |
Tags: math
Correct Solution:
```
while True:
try:
t=int(input())
except:
break
for i in range(t):
count=0
L,v,l,r=map(int,input().split())
sum=L//v
ll=l//v
lr=r//v
if l==r and l%v==0:
sum=sum-(lr-ll)-1
elif l%v==0:
... | output | 1 | 58,854 | 1 | 117,709 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e. at the first minute the train is at the point ... | instruction | 0 | 58,855 | 1 | 117,710 |
Tags: math
Correct Solution:
```
#!usr/bin/python
T = 0
L = 0
v = 0
l = 0
r = 0
def getAns(x):
return x//v
T = int(input())
while T > 0:
T = T - 1
L,v,l,r = map(int, input().strip().split())
print(getAns(L) - getAns(r) + getAns(l-1))
``` | output | 1 | 58,855 | 1 | 117,711 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e.... | instruction | 0 | 58,856 | 1 | 117,712 |
Yes | output | 1 | 58,856 | 1 | 117,713 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e.... | instruction | 0 | 58,857 | 1 | 117,714 |
Yes | output | 1 | 58,857 | 1 | 117,715 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e.... | instruction | 0 | 58,858 | 1 | 117,716 |
Yes | output | 1 | 58,858 | 1 | 117,717 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e.... | instruction | 0 | 58,859 | 1 | 117,718 |
Yes | output | 1 | 58,859 | 1 | 117,719 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e.... | instruction | 0 | 58,860 | 1 | 117,720 |
No | output | 1 | 58,860 | 1 | 117,721 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e.... | instruction | 0 | 58,861 | 1 | 117,722 |
No | output | 1 | 58,861 | 1 | 117,723 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e.... | instruction | 0 | 58,862 | 1 | 117,724 |
No | output | 1 | 58,862 | 1 | 117,725 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Vova plans to go to the conference by train. Initially, the train is at the point 1 and the destination point of the path is the point L. The speed of the train is 1 length unit per minute (i.e.... | instruction | 0 | 58,863 | 1 | 117,726 |
No | output | 1 | 58,863 | 1 | 117,727 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her journey as follows. First of all, she will choose ... | instruction | 0 | 58,978 | 1 | 117,956 |
Tags: data structures, dp, greedy, math, sortings
Correct Solution:
```
n=int(input())
arr=list(map(int,input().split()))
temp={}
for i in range(n):
if i-arr[i] in temp:
temp[i-arr[i]]+=arr[i]
else:
temp[i-arr[i]]=arr[i]
print(max(temp.values()))
``` | output | 1 | 58,978 | 1 | 117,957 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her journey as follows. First of all, she will choose ... | instruction | 0 | 58,979 | 1 | 117,958 |
Tags: data structures, dp, greedy, math, sortings
Correct Solution:
```
import string
def main():
n = int(input())
b = list(map(int, input().split()))
dct = dict()
for i in range(n):
if b[i] - i in dct:
dct[b[i] - i] += b[i]
else:
dct[b[i] - i] = b[i]
print(... | output | 1 | 58,979 | 1 | 117,959 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her journey as follows. First of all, she will choose ... | instruction | 0 | 58,980 | 1 | 117,960 |
Tags: data structures, dp, greedy, math, sortings
Correct Solution:
```
import sys
def fastio():
from io import StringIO
from atexit import register
global input
sys.stdin = StringIO(sys.stdin.read())
input = lambda : sys.stdin.readline().rstrip('\r\n')
sys.stdout = StringIO()
register(lambda : sys.__stdout__.wr... | output | 1 | 58,980 | 1 | 117,961 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her journey as follows. First of all, she will choose ... | instruction | 0 | 58,981 | 1 | 117,962 |
Tags: data structures, dp, greedy, math, sortings
Correct Solution:
```
n = int(input())
b = list(map(int, input().split()))
next_dest = [-1 for i in range(n)]
accumul = [b[i] for i in range(n)]
diff_to_b = {}
ans = 0
for i in range(n):
if b[i] - i in diff_to_b:
diff_to_b[b[i] - i] += b[i]
if diff_to_b[b[i] - i] ... | output | 1 | 58,981 | 1 | 117,963 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her journey as follows. First of all, she will choose ... | instruction | 0 | 58,982 | 1 | 117,964 |
Tags: data structures, dp, greedy, math, sortings
Correct Solution:
```
from collections import defaultdict
input()
best = defaultdict(int)
a = [int(x) for x in input().split()]
for i, ai in enumerate(a):
best[ai - i] += ai
print(best[max(best, key=best.get)])
``` | output | 1 | 58,982 | 1 | 117,965 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her journey as follows. First of all, she will choose ... | instruction | 0 | 58,983 | 1 | 117,966 |
Tags: data structures, dp, greedy, math, sortings
Correct Solution:
```
import sys
input=sys.stdin.readline
from math import *
n=int(input())
a=[int(x) for x in input().split()]
maxi=max(a)
d={}
for i in range(n):
if a[i]-i in d:
d[a[i]-i]+=a[i]
else:
d[a[i]-i]=a[i]
for i in d:
maxi=max(maxi... | output | 1 | 58,983 | 1 | 117,967 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her journey as follows. First of all, she will choose ... | instruction | 0 | 58,984 | 1 | 117,968 |
Tags: data structures, dp, greedy, math, sortings
Correct Solution:
```
# from debug import debug
inf = int(1e10)
n = int(input())
lis = list(map(int, input().split()))
c = sorted([(lis[i]-i, lis[i]) for i in range(n)])
v = c[0][1]
ans = 0
for i in range(1, n):
if c[i-1][0] == c[i][0]:
v+=c[i][1]
else:
ans = max... | output | 1 | 58,984 | 1 | 117,969 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her journey as follows. First of all, she will choose ... | instruction | 0 | 58,985 | 1 | 117,970 |
Tags: data structures, dp, greedy, math, sortings
Correct Solution:
```
n = int(input())
arr = list(map(int, input().split()))
d = {}
for i in range(n):
val = arr[i]-i
if val not in d:
d[val] = [arr[i]]
else:
d[val].append(arr[i])
m = -10**10
ans = []
for i in d:
m = max(m,sum(d[i]))
print(m)
``` | output | 1 | 58,985 | 1 | 117,971 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her jou... | instruction | 0 | 58,986 | 1 | 117,972 |
Yes | output | 1 | 58,986 | 1 | 117,973 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her jou... | instruction | 0 | 58,987 | 1 | 117,974 |
Yes | output | 1 | 58,987 | 1 | 117,975 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her jou... | instruction | 0 | 58,988 | 1 | 117,976 |
Yes | output | 1 | 58,988 | 1 | 117,977 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her jou... | instruction | 0 | 58,989 | 1 | 117,978 |
Yes | output | 1 | 58,989 | 1 | 117,979 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her jou... | instruction | 0 | 58,990 | 1 | 117,980 |
No | output | 1 | 58,990 | 1 | 117,981 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her jou... | instruction | 0 | 58,991 | 1 | 117,982 |
No | output | 1 | 58,991 | 1 | 117,983 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her jou... | instruction | 0 | 58,992 | 1 | 117,984 |
No | output | 1 | 58,992 | 1 | 117,985 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Tanya wants to go on a journey across the cities of Berland. There are n cities situated along the main railroad line of Berland, and these cities are numbered from 1 to n.
Tanya plans her jou... | instruction | 0 | 58,993 | 1 | 117,986 |
No | output | 1 | 58,993 | 1 | 117,987 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
It's our faculty's 34th anniversary! To celebrate this great event, the Faculty of Computer Science, University of Indonesia (Fasilkom), held CPC - Coloring Pavements Competition. The gist of CP... | instruction | 0 | 59,043 | 1 | 118,086 |
No | output | 1 | 59,043 | 1 | 118,087 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
It's our faculty's 34th anniversary! To celebrate this great event, the Faculty of Computer Science, University of Indonesia (Fasilkom), held CPC - Coloring Pavements Competition. The gist of CP... | instruction | 0 | 59,044 | 1 | 118,088 |
No | output | 1 | 59,044 | 1 | 118,089 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A few years ago Sajjad left his school and register to another one due to security reasons. Now he wishes to find Amir, one of his schoolmates and good friends.
There are n schools numerated fr... | instruction | 0 | 59,373 | 1 | 118,746 |
Yes | output | 1 | 59,373 | 1 | 118,747 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A few years ago Sajjad left his school and register to another one due to security reasons. Now he wishes to find Amir, one of his schoolmates and good friends.
There are n schools numerated fr... | instruction | 0 | 59,374 | 1 | 118,748 |
Yes | output | 1 | 59,374 | 1 | 118,749 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A few years ago Sajjad left his school and register to another one due to security reasons. Now he wishes to find Amir, one of his schoolmates and good friends.
There are n schools numerated fr... | instruction | 0 | 59,375 | 1 | 118,750 |
Yes | output | 1 | 59,375 | 1 | 118,751 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A few years ago Sajjad left his school and register to another one due to security reasons. Now he wishes to find Amir, one of his schoolmates and good friends.
There are n schools numerated fr... | instruction | 0 | 59,376 | 1 | 118,752 |
Yes | output | 1 | 59,376 | 1 | 118,753 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A few years ago Sajjad left his school and register to another one due to security reasons. Now he wishes to find Amir, one of his schoolmates and good friends.
There are n schools numerated fr... | instruction | 0 | 59,377 | 1 | 118,754 |
No | output | 1 | 59,377 | 1 | 118,755 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A few years ago Sajjad left his school and register to another one due to security reasons. Now he wishes to find Amir, one of his schoolmates and good friends.
There are n schools numerated fr... | instruction | 0 | 59,378 | 1 | 118,756 |
No | output | 1 | 59,378 | 1 | 118,757 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A few years ago Sajjad left his school and register to another one due to security reasons. Now he wishes to find Amir, one of his schoolmates and good friends.
There are n schools numerated fr... | instruction | 0 | 59,379 | 1 | 118,758 |
No | output | 1 | 59,379 | 1 | 118,759 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A few years ago Sajjad left his school and register to another one due to security reasons. Now he wishes to find Amir, one of his schoolmates and good friends.
There are n schools numerated fr... | instruction | 0 | 59,380 | 1 | 118,760 |
No | output | 1 | 59,380 | 1 | 118,761 |
Provide tags and a correct Python 3 solution for this coding contest problem.
The Berland capital (as you very well know) contains n junctions, some pairs of which are connected by two-way roads. Unfortunately, the number of traffic jams in the capital has increased dramatically, that's why it was decided to build sev... | instruction | 0 | 60,143 | 1 | 120,286 |
Tags: graphs
Correct Solution:
```
import sys
import threading
def main():
p = input().split()
n = int(p[0]) #number of locations
m = int(p[1]) #number of passages
if n==1: #if there's only one location, there's nothing to do
print(0)
return
if n==2: #if there's only two node... | output | 1 | 60,143 | 1 | 120,287 |
Provide tags and a correct Python 3 solution for this coding contest problem.
The Berland capital (as you very well know) contains n junctions, some pairs of which are connected by two-way roads. Unfortunately, the number of traffic jams in the capital has increased dramatically, that's why it was decided to build sev... | instruction | 0 | 60,144 | 1 | 120,288 |
Tags: graphs
Correct Solution:
```
import sys
import threading
def main():
p = input().split()
n = int(p[0]) #number of locations
m = int(p[1]) #number of passages
if n==1:
print(0)
return
if n==2:
print(-1)
return
g = graph(n,m)
sys.setrecursionlimi... | output | 1 | 60,144 | 1 | 120,289 |
Provide tags and a correct Python 3 solution for this coding contest problem.
The Berland capital (as you very well know) contains n junctions, some pairs of which are connected by two-way roads. Unfortunately, the number of traffic jams in the capital has increased dramatically, that's why it was decided to build sev... | instruction | 0 | 60,145 | 1 | 120,290 |
Tags: graphs
Correct Solution:
```
def dfs1(v):
mark[v]=1
st.append(v)
dp[v]=d[v]
for u in adj[v]:
if not mark[u]:
d[u]=d[v]+1
dfs1(u)
dp[v]=min(dp[u],dp[v])
elif d[u]<d[v]-1:
dp[v]=min(dp[v],d[u])
if dp[v]==d[v]:
ver[cnt[0]]=v
... | output | 1 | 60,145 | 1 | 120,291 |
Provide tags and a correct Python 3 solution for this coding contest problem.
The Berland capital (as you very well know) contains n junctions, some pairs of which are connected by two-way roads. Unfortunately, the number of traffic jams in the capital has increased dramatically, that's why it was decided to build sev... | instruction | 0 | 60,146 | 1 | 120,292 |
Tags: graphs
Correct Solution:
```
import sys
import threading
def main():
p = input().split()
n = int(p[0]) #number of locations
m = int(p[1]) #number of passages
if n==1: #if there's only one location, there's nothing to do
print(0)
return
if n==2: #if there's only two node... | output | 1 | 60,146 | 1 | 120,293 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
The Berland capital (as you very well know) contains n junctions, some pairs of which are connected by two-way roads. Unfortunately, the number of traffic jams in the capital has increased drama... | instruction | 0 | 60,147 | 1 | 120,294 |
No | output | 1 | 60,147 | 1 | 120,295 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
The Berland capital (as you very well know) contains n junctions, some pairs of which are connected by two-way roads. Unfortunately, the number of traffic jams in the capital has increased drama... | instruction | 0 | 60,148 | 1 | 120,296 |
No | output | 1 | 60,148 | 1 | 120,297 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
The Berland capital (as you very well know) contains n junctions, some pairs of which are connected by two-way roads. Unfortunately, the number of traffic jams in the capital has increased drama... | instruction | 0 | 60,149 | 1 | 120,298 |
No | output | 1 | 60,149 | 1 | 120,299 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
The Berland capital (as you very well know) contains n junctions, some pairs of which are connected by two-way roads. Unfortunately, the number of traffic jams in the capital has increased drama... | instruction | 0 | 60,150 | 1 | 120,300 |
No | output | 1 | 60,150 | 1 | 120,301 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya commutes by train every day. There are n train stations in the city, and at the i-th station it's possible to buy only tickets to stations from i + 1 to ai inclusive. No tickets are sold at the last station.
Let Οi, j be the minimum n... | instruction | 0 | 60,255 | 1 | 120,510 |
Tags: data structures, dp, greedy
Correct Solution:
```
import os, sys
from io import BytesIO, IOBase
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
... | output | 1 | 60,255 | 1 | 120,511 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya commutes by train every day. There are n train stations in the city, and at the i-th station it's possible to buy only tickets to stations from i + 1 to ai inclusive. No tickets are sold at the last station.
Let Οi, j be the minimum n... | instruction | 0 | 60,256 | 1 | 120,512 |
Tags: data structures, dp, greedy
Correct Solution:
```
import sys
input = sys.stdin.readline
def solve():
n = int(input())
a = list(map(int, input().split()))
T = [(-1,-1)]*(2*n)
for i in range(n-1):
T[i+n] = (a[i], i)
T[n+n-1] = (n, n-1)
for i in range(n-1,-1,-1):
T[i] = max(T[2*i], T[2*i+1])
dp = [0]*n
... | output | 1 | 60,256 | 1 | 120,513 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya commutes by train every day. There are n train stations in the city, and at the i-th station it's possible to buy only tickets to stations from i + 1 to ai inclusive. No tickets are sold at the last station.
Let Οi, j be the minimum n... | instruction | 0 | 60,257 | 1 | 120,514 |
Tags: data structures, dp, greedy
Correct Solution:
```
n=int(input())
a=list(map(int, input().split()))
a=[ai-1 for ai in a]
a[n:n] = [n - 1]
dp=[0]*n
ans=0
i=n-2
nmax=2**17
tree=[[0,0]]*2*nmax;
#Build Segment tree
j=0
while j<n:
tree[nmax + j] = [a[j], j]
j=j+1
j=nmax-1
while j>0:
tree[j]=max(tree[j*2]... | output | 1 | 60,257 | 1 | 120,515 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Vasya commutes by train every day. There are n train stations in the city, and at the i-th station it's possible to buy only tickets to stations from i + 1 to ai inclusive. No tickets are sold at the last station.
Let Οi, j be the minimum n... | instruction | 0 | 60,258 | 1 | 120,516 |
Tags: data structures, dp, greedy
Correct Solution:
```
MAX_N = 100000
def maxi(a, b):
if a[0] > b[0]:
return a
else:
return b
class Segment_Tree:
def init(self, left, right, data, leftbound, rightbound):
self.data = data
self.left = left
self.right = right
... | output | 1 | 60,258 | 1 | 120,517 |
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