instruction stringlengths 34 53.1k |
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Your task
Given a string of lowercase letters, output the "alphabet checksum" of that string, as a letter.
Example
Let's say we have the string "helloworld". With a = 0, b = 1, c = 2 ... z = 25, we can replace all of the letters with numbers:
h e l l o w o r l d
7 4 11 11 14 22 14 17 11 3
Now, we can sum th... |
I got an email from Hugo Pfoertner, an Editor-in-Chief at the On-Line Encyclopedia of Integer Sequences, with a terrific idea for a fastest-code challenge, which will also help verify or expand the boundary of an open mathematical question in optimization.
Here's the idea: we want to confirm and extend OEIS sequences A... |
Given an integer \$n > 1\$, output a balanced binary tree with \$n\$ leaf nodes.
The tree should be constructed out of (space), \ and / (slashes). Each slash represents a branch.
A node is represented by adjacent slashes: /\. There must be a root node at the top of the tree (i.e. the first row of the output).
To con... |
Imagine that there are \$n\$ different types of objects \$O_1,O_2,O_3,\ldots,O_n\$ and they each have a conversion factor \$k_1,k_2,k_3,\ldots,k_n\$. You can, for any \$1\le i\le n\$, convert \$k_i\$ amount of \$O_i\$ into \$1\$ of any other type of object.
Task
Your objective is to output all the possible ending confi... |
You know those letterboards outside old-style cinemas which show upcoming films - perhaps you have a miniature one in your home?
If you've operated one, you'll know that you can normally add letters from either side of a row. But the slots (in which you slide letters) are thin, so it's impossible to swap the order of ... |
A Fermi-Dirac Prime is a prime power of the form \$p^{2^k}\$, where \$p\$ is prime and \$k \geq 0\$, or in other words, a prime to the power of an integer power of two. They are listed as integer sequence A050376. While a normal prime factorization generally does not contain a set of distinct primes (for example \$24=2... |
The cardinality of the set \$\mathbb Q\$ of rational numbers is known to be exactly the same as that of the set \$\mathbb Z\$ of integers. This means that it is possible to construct a bijection between these sets—a mapping such that each integer corresponds to exactly one rational number, and vice versa.
Provide such ... |
Given a string and a substring and a positive integer n.
Remove the n occurences of a substring from the end of the originally given string. If the substring is not present in the string or the number of times the substring appears is less than n, then the output is the original string. No space should be present in pl... |
Find the max number of Xs you can fit onto a rectangular tic-tac-toe board of length l and height h without ever having 3 consecutive Xs in a row diagonally, horizontally, or vertically.
This is a code-golf challenge so shortest code wins!
Input
A single line containing values l and h, representing the length and heigh... |
Write a program or function (hereafter "function") that returns or prints the source code of four new functions: Increment, decrement, undo, and peek.
The initial function contains an internal integer value of 0. Each of the returned functions contains a value based on that value, and each behaves differently:
Increme... |
The look-say sequence is a sequence of lists of numbers where each element is the previous element with run length encoding. Run length encoding is the process of grouping together like elements and then giving the element and the size of the group for each group. So for example:
1 1 1 2 2 1
To run length encode thi... |
Computers like binary. Humans like base 10. Assuming users are humans, why not find the best of both worlds?
Your task is to find the first n terms in the sequence A008559 where each term is the binary representation of the previous number interpreted as a base 10 number.
Input
An integer greater than 0. Note that the ... |
Python string parsing has quite a few edge cases. This is a string:
"a"
Putting 2 strings immediately after each other implicitly concatenates them, so this is also a string:
"a""a"
However, if you put 3 quotes in a row, it will create a "triple quoted string" which can only be ended by another 3 quotes in a row. A t... |
For the purpose of this challenge a rectangular piece of ASCII art is Mondrian if it looks the same upside down.
What does "looks the same" mean?
A feature is any orthogonally connected region of at last 5 characters. A Mondrian feature is any feature that appears in the same picture upside down. (This includes the pos... |
Your task
Given two positive integers \$x\$ and \$d\$ (such that \$d<x\$), output the 5th term of the \$d\$th difference of the sequence \$n^x\$
Example
Let's say we are given the inputs \$x=4\$ and \$d=2\$.
First, we get the series \$n^4\$:
\$0^4 = 0\$
\$1^4 = 1\$
\$2^4 = 16\$
\$3^4 = 81\$
...
These are the first 10... |
Based off a Scratch project
The pen extension in Scratch has a set pen color to () block. The () is normally a color dropdown, but you can also use the join()() block. In the join()() block, normally a hex value is in the first input, but the second is just an empty string.
However, many new Scratchers that want to t... |
Challenge: With any given number that has multiple digits, every digit in the number needs to repeatedly be summed together until the sum is a single digit number. To make things interesting, if there's a 0 in the number, then it must equal 26, because zero starts with the letter z, which is the 26th and final letter o... |
A bracelet consists of a number, \$\mathit{N}\$, of beads connected in a loop. Each bead may be any of \$\mathit{C}\$ colours. Bracelets are invariant under rotation (shifting beads around the loop) and reflection (turning the bracelet over).
Here are all \$11\$ bracelets with exactly two beads of each of three differe... |
Given a set of substrings, such as [ca, ar, car, rd], it's possible to create infinitely many strings by concatting them together. Some examples of this for the given substrings could be:
ca
caar
card
rdca
carrd
rdrd
...
One interesting property of this set of substrings is that any string can only be constructed in o... |
Your task
Take a list of strings as the input, and output the maximum average ord.
Example
Given the list ['hello', 'world', 'bye']:
The average ord of 'hello' is:
(ord(h) + ord(e) + ord(l) + ord(l) + ord(o)) / len('hello')
= 106.4
The average ord of 'world' = 110.4
The average ord of 'bye' = 106.7
The maximum ave... |
Your program should take as input a number n that is greater than 0 and output a bar composed of n // 8 ▉ characters (U+2588), as well as a final character which should be one of ▉ ▊ ▋ ▌ ▍ ▎▏(U+2589 to U+258F) representing n % 8. If n % 8 is 0, your program should not output any additional characters. This is difficult... |
A Young diagram is a rectangular binary mask whose every row and every column are sorted in descending order.
It is easy to check that every rectangular binary mask can be formed by xor-ing together a finite number of Young diagrams.
This decomposition is by no means unique, but there will be a minimum number of Young ... |
Write a script, program or function which takes one input of type string and outputs or returns some sort of indication wether the input string was 'hi whats up' (without the apostrophes) or not.
You can for example return true if it was and false if it wasn't. Or print something to the screen, like 1 or 0.
It just has... |
There exists a bijection between the natural and rational numbers that works (approximately) like this:
You create a 1-indexed 2-dimensional grid.
In every field of this grid with position (x, y), put the number x / y.
You start at (1,1) and iterate over the field in the following way:
However, this task is not abou... |
The pyramid begins with the row 1 1. We'll call this row 1. For each subsequent row, start with the previous row and insert the current row number between every adjacent pair of numbers that sums to the current row number.
$$
1\quad1\\
1\quad\color{red}{2}\quad1\\
1\quad\color{red}{3}\quad2\quad\color{red}{3}\quad1\\
1... |
Background
For the purposes of this challenge, we'll define a "perfect nontransitive set" to be a set \$A\$ with some irreflexive, antisymmetric relation \$<\$, such that for all \$a \in A\$ we have that \$|\{x \in A|x<a\}|=|\{x \in A|x>a\}|\$.
Okay, now in layperson's terms: \$A\$ is a set of elements with no duplicat... |
A near-repdigit number is a positive integer where all the digits are the same, except one. For example 101 and 227 are near-repdigits. A near-repdigit prime is a near-repdigit that is also prime. For example:
101, 113, 131, 151, 181, 191, 199, 211, 223, 227, 229, 233, 277, 311, 313, 331, 337, 353, 373, 383, 433, 443, ... |
Background
Boolean Algebra concerns representing values with letters and simplifying expressions. The following is a chart for the standard notation used:
Above is what actual boolean algebra looks like. For the purposes of this code golf, this is not the syntax that will be used.
Your Task
Given a string with three c... |
Background
HQ0-9+-INCOMPUTABLE?! is a half-joke programming language introduced in Internet Problem Solving Contest 2011, Problem H.
HQ9+ is an esoteric programming language specialized for certain
tasks. For example, printing “Hello, world!” or writing a quine (a
program that prints itself) couldn’t be any simpler. U... |
Given a non negative integer number tell if it can be erased by repeatedly removing all occurrences of the length of that number from it including overlapping matches.
Erasing means cancel all its digits.
For example the number 4440 is not lengthy because after removing all 4's you obtain 0 which cannot be erased.
Nei... |
There was a previous perceptron question but it was closed. Also it required a lot of extra stuff that's not normally part of the perception algorithm like I know it. This question will be much simpler
The Perceptron is a extremely basic classification algorithm. While it still has some limited use it's been mostly ove... |
A palindrome is a word that is its own reverse. I will define the left palindromic root of a word as the shortest prefix of the word for which the shortest possible palindrome that begins with that prefix is the original word. So the left palindromic root of racecar is race and the left palindromic root of ABBA is ABB.... |
Warning: Wouldn't you rather answer a challenge about ponies?1
If you have read The Hostile Hospital, you would know that the Baudelaire orphans, from one of the scraps of paper recovered from the Quagmire's notebooks, they discover a name, "Ana Gram". Later on, they realize that means the word "anagram", not a name.... |
The task
Most Casio calculators featured a variable M, which has 3 operators related to it: M, M+, and M-
M, as you can expect, returns the value stored in the variable.
M+ takes the number on the left and add it to M.
M- does the same thing as M+, but subtract instead.
To make the challenge just a bit more difficult, ... |
Given is a grid polygon by the list of its integer vertex coordinates arranged along the perimeter, in the form
\$(x_1,y_1), (x_2,y_2), \cdots , (x_n,y_n)\$ with \$n \ge 3\$.
The polygon is completed by connecting point \$n\$ to point \$1\$.
For simplicity, it may be assumed that the polygon is simple and does not have... |
Background
With the success of Simple Boolean Algebra Calculator, I present a more difficult problem.
Boolean Algebra concerns representing values with letters and simplifying expressions. The following is a chart for the standard notation used:
Above is what actual boolean algebra looks like. For the purposes of this... |
The famous game of Qwirkle has simple but intricate rules (See part 2 of this question for a summary of the rules!)
The Challenge
You are somehow (text input, function parameter, whatever) given a board of a Qwirkle game, like a snapshot from any current timeframe within a game. This board can be anything from complet... |
Your task
Given a numerical string or integer \$\ge 0\$ (which may have leading zeros), convert it to letters using the below rules.
Rules
Loop through the digits:
If the digit is 0 or 1, combine it with the next digit and output that letter of the alphabet (0-indexed).
If the digit is 2, combine with the next digit O... |
The Cabbage, Wolf, Goat riddle with a twist!
Backstory:
There’s an intergalactic river than needs to be crossed! Being a space-ferryman you’ve offered some aliens on your small space ferry that can only carry two entities: you and a passenger. However, you know that because politics, some of these aliens will instantly... |
Inspiration
There is a problem on the most recent AMC 12B test, the one held on November 16, 2022, which goes like this:
(AMC 12B 2022, Question 17)
How many \$4\times4\$ arrays whose entries are \$0\$s and \$1\$s are there such that the row sums (the sum of the entries in each row) are \$1\$, \$2\$, \$3\$, and \$4\$,... |
Input: A string
Output: The rarity of the string, as described below.
To find the rarity of a string, follow the steps below.
Start with 0.
Subtract 3 for each E, A, T, or O in the string.
Subtract 2 for each I, N, S, or H in the string.
Subtract 1 for each R, D, L, or C in the string.
Add 1 for each W, F, G, or Y in ... |
Background and Rules
There is a variant of chess called atomic chess, which follows essentially the same rules as normal chess, except that pieces explodes other pieces around them when captured. In addition to checkmate, you can also win the game by blowing up the king.
When a piece captures another piece, all adjace... |
It frustrates me that when you say "base 16", the 16 is in base 10. We need a base neutral way of writing down numbers when favoring a specific base would be inappropriate.
How it works
We define <n> to be the nth prime. So <1>=2, <2>=3, <3>=5. Note that every positive integer can be uniquely represented by the product... |
The aim is to create an algorithm to detect that one of the string in a small list of strings contains %s, %d, %f, or %r. All sub-string will start by '%' and be 2 characters longs. Input string will be from 1 to 500 characters with a median of around 20 characters and contain zero to multiple of the possible sub-stri... |
(This is OEIS A057531.)
Your task
Given a positive integer, \$n\$, find the \$n\$th number where the digit sum equals the number of factors
Explanation
For example, let's take 22:
Its factors are \$[1, 2, 11, 22]\$ (length: 4).
Its digit sum is 4.
This means that it is a number where the digit sum equals the number of ... |
The challenge is to write a program which will find the shortest (least number of characters) command which will navigate to a target directory, given a starting directory, assuming a standard linux file system.
Take the following file system as an example, starting from ~:
.
├── target
└── test
└── starting
If th... |
Your task
Given a string, output the range of ASCII values.
Example
Let's say we have the string Hello.
We get the ASCII values:
H = 72
e = 101
l = 108
l = 108
o = 111
Now, we get the range (max - min):
111 - 72 = 39
Our answer is 39.
Test cases
Input Output
Hello, World! 82
aaaaa 0
Code Golf ... |
I like to play (The Settlers of) Catan on Board Game Arena with totally random number tokens. These tokens determine the production rate of the terrain tiles beneath:
There are 18 number tokens, two each of 3, 4, 5, 6, 8, 9, 10, 11 and one each of 2 and 12. A valid arrangement of these tokens on the board (19 hexes in... |
Following last year's event, we're doing Code Golf Advent Calendar 2022!
On each day from today (Dec 1) until Christmas (Dec 25), a Christmas-themed challenge will be posted, just like an Advent calendar. It is a free-for-all and just-have-fun-by-participation event, no leaderboards and no prizes for solving them fast ... |
Description
Inspired by this question, write a program/function to encode a number and a program (possibly the same as the first) to decode a bitstream in variable-length encoding as follows (taken from that question's answer, slightly modified):
Represent the string x using the following encoding:
$$0, x_k, \dots, 0,... |
“Cut” a matrix of integers on the line where the sum of the absolute differences of “severed” neighbors is the least.
Example
Consider this matrix:
1 2 -4
5 -1 3
2 -2 0
It can be cut in 4 places, here shown by lines lettered A–D:
A B
╷ ╷
1 ╎ 2 ╎ -4
C ---╎----╎----
5 ╎ -1 ╎ 3
D ---╎----╎--... |
Write the shortest possible program or function that will join a list of columnar strings.
For this challenge, columnar strings are defined as one-character-wide strings spanning across multiple lines. Each character, except for the last one, is separated by a newline character. Some examples, separated by ---:
a
b
c
d... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
An Elf is hopping on a chessboard which extends infinitely in all four directions. They move like a generalized chess Knight: on each step, they move X units horizontally and Y units vertically, or Y units horizontally and X units vert... |
Given a matrix of integers \$M\$ and a list of four integers \$L\$, find the sub-matrix \$N\$ whose corners are given by \$L\$ and return the sum of its elements.
Suppose you're given the list \$L = [-8, -3, 2, 9]\$ and the following matrix \$M\$. The numbers in the list are highlighted in blue to illustrate:
$$
\begi... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
I've got an infinite supply of \$n\$-dimensional chocolate for some positive integer \$n\$. The shape of the chocolate is not important. You may assume that they are just \$n\$-dimensional hypercubes with side length \$1\$.
To celebrat... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
Christmas is coming up, and Santa hasn't kept to his diet very well this year. Due to his size, he is getting the elves to collect a list of all the chimneys he will be able to fit down. Unfortunately, chimneys these days are a bit of ... |
The task is simple. You're given an arbitrary string message. Return that message prefixed with a number, such that the length of that number plus the message equals the number. In other words, the length in your output must be the total length of your output.
If multiple candidates exist, you can output any of them.
F... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
It's time to prepare an advent calendar, but I've only got a large sheet of rectangular paper, randomly colored red and green like this:
GRRRGRRGRG
GGRGGGRRGR
GRRGRGRGRG
GGRRGRGRGG
GRGGRGRGGG
RRGRGRGRRG
RRRGRGRGGG
RGGRGGRRRG
RGGGRRRRRG... |
In 2009, Hannah Alpert described the "far-difference" representation, a novel way of representing integers as sums and differences of Fibonacci numbers according to the following rules:
every two terms of the same sign differ in index by at least 4, and
every two terms with different signs differ in index by at least ... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
On the flight to Hawaii for vacation, I'm playing with a deck of cards numbered from 1 to \$n\$. Out of curiosity, I come up with a definition of "magic number" for a shuffled deck:
The magic number of a shuffle is the minimum number ... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
Fen is a magician Elf. He can cast spells on an array of numbers to produce another number or array of numbers.
One of his inventions is the Wick spell. He loves to use this spell because "once this spell is applied, a combination of p... |
I struggle to easily encode big numbers in ><>. If only there was a program that could find the best way for me?
What is ><>
><>, pronounced "fish", is a esoteric 2dimentional programing language. We will consider a subset here, consisting of the following commands:
0123456789 push one number to the stack, equal to th... |
Your task is to make a program in L that takes n as an input number, output a program p in L that prints its own first n characters.
Rules
The program p has to be irreducible, See an example below.
PAY ATTENTION TO THIS RULE: If a program takes an input as n, the first n characters of the output would be the same as... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
Fen is a magician Elf. He can cast spells on an array of numbers to produce another number or array of numbers.
One of his inventions is the Wick spell. He likes this magic so much that he's cast it on every single array in sight. Now ... |
Santa's Shortest Path Problem
Trying to be as time-efficient as possible Santa needs to plan his trips carefully. Given a 5X5 grid representing a map of villages it is your task to be Santa's flight controller. Show santa the shortest and therefor fastest route to fly his sleigh and give him a list of coördinates (or d... |
Note: This is a more limited version of a challenge from 2014 that only received one answer. That challenge required participants write two programs; this challenge is essentially one half of that. The text here is original, but credit for the idea goes to Matthew Butterick, who is no longer active on the site.
Given... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
The Elves like playing number games. One day, Bin (a friend of Fen) suggests a new game: given a positive integer n, each Elf says a number which has exactly n runs of ones in binary. The first Elf must say the smallest number, and the... |
Rolling a 1x1x2 block
This challenge is inspired by the game Bloxorz. Like that game, there is a 1x1x2 block, which may be moved on a square grid in any of the four cardinal directions. It moves by rotating 90 degrees about one of its edges which is touching the ground. Initially, the block is standing upright on a sin... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
Santa likes to sort his presents in a special way. He keeps "uninterleaving" the pile of presents into smaller sub-piles until each sub-pile is either full of toys or full of coal.
Your job is to, given a pile of presents, determine th... |
Traditionally presents are kept secret in boxes wrapped in paper. Since the ice caps are melting Santa Claus has begun to investigate some ways they might make the whole gift wrapping operation a little more eco-friendly. The first thing they've decided to do is to put all presents in perfectly cubic boxes. This makes... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
There's a good news and a bad news.
Good news: you got a Christmas present from Santa. (Already?! Christmas is two weeks away!)
Bad news: the present is locked with a laser lock. And a note next to it says:
Only the ones who can prope... |
Given a positive integer n.
Generate a JSON array (can be a string, or your language's built-in JSON representation as long as we can get valid JSON, (your code does not need to include outputting the string, you can just use the built-in JSON representation)) containing two empty JSON arrays, then, add a set of 2 empt... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
You successfully route the laser into the sensor, but nothing happens.
"What?" Frustrated, you flip the note from Santa. There's some more text:
Calculate the number of ways to complete the laser puzzle, and enter it into the number p... |
A neat trick is if you ever need a nine-sided die, it is possible to make one using two six-sided dice using the numbers below. This is assuming you either have a way to rewrite the faces on the dice, or use some algorithm to map the numbers on a normal die onto these new numbers.
0 0 3 3 6 6
-----------
1|1 1 4 4 ... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
As we all know, Santa comes down the chimney to deliver presents to good kids. But chimneys are normally full of smoke, and the Elves are worried about Santa's health. So they decide to blow the smoke out using an electronic air blower... |
Sometimes when you're playing Wordle, you get to your fifth guess and you can't figure out the word any more, so you start mentally running through the list of remaining iterations, both sensical and nonsensical trying to figure out what those last few letters are.
The task here is to create all permutations of a final... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
While other Elves are busy carrying air blowers, Fen comes and shouts, "I've got a spell for this job!"
To recap, a chimney is modeled as a rectangular grid. The number in each cell represents the amount of smoke in the region. The lef... |
Input a list of strings a and a string s for search keyword. Find out all strings in a which contains s as subsequence. And sort them in the following order:
Exactly equals to s
Starts with s
Contains s as substring (continuous subsequence)
Contains s as subsequence
Detail
When two strings belongs to the same sortin... |
Each element on the periodic table of the elements has an atomic weight. For example, boron (element 5) has an atomic weight of 10.81. Your challenge is to write a program which takes as input the atomic number of an element and outputs its atomic weight.
Your program only needs to support elements up to and including ... |
Introduction
In the binary representation of a \$k-\$bit \$(k>1)\$ square number \$n^2, \$ not all bits can be \$1\$. The maximum number of \$1\$-bits (Hamming weight, \$B\$ for short) is given in A357658, but only up to \$k=95\$ bits.
An example of a \$99\$-bit square is \$B(796095014224053^2)=87\$. The records in A35... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
As soon as the Elves get bored with the last week's game, Bin comes up with a new game. The rules are similar, except the Elves are supposed to say the numbers that have its "left side" equal to its "right side" when written in binary.... |
Given a rectangle input with only \, / and space, decide if it's a valid output of Drawing in Slashes
Empty lines and columns at edge get cleaned up, so the 3rd true case is true.
True cases:
/\/\
/ /\ \
\/ / \
/\/ /\ \
\ / \/
\ \
\ \
\/
/\/\
/ /\ \
/ \ \/
/ /\ \/\
\/ \ /
/ /
... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
Inspired by https://xkcd.com/835
In the midst of his mid-life crisis, Santa has impulsively purchased a Sports Sleigh™ for present delivery this year. The only problem is that this sleigh has a specially designed Infinite Present Trunk... |
I have a string like this:
s = "helloworldandhellocodegolf"
I want to make every consonant after a vowel uppercase.
Desired output:
heLloWoRldaNdheLloCoDeGoLf
As you can see, l gets uppercased because it's right after the vowel e etc..
If there are repeated vowels, like:
s = "aabeekad"
Desired output:
s = "aaBeeKaD"... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
It's Hanukkah! Unfortunately, it appears some of the candles in your menorah have been blown out. You've got a lighter on hand, but it doesn't work quite right. Whenever you use your lighter at position k, the candles at positions k-1,... |
I have a number like this:
n = 548915381
The output should be the sum of every second digit of that number. In this case 26:
4+9+5+8 = 26
Rules:
This is a code-golf, so the shortest code in bytes wins.
The input consists only of numbers bigger than 10 (at least 2 digits) but smaller than a 32-bit integer.
The input ... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
Happy Hanukkah!
A beloved Hanukkah tradition for many, the game of Dreidel (s'vivon in Hebrew) is a betting game (for money or for chocolate gelt (coins)) centered on the titular spinning tops called dreidels. Dreidels have four sides:... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
Oh no, Santa spilled wine all over his great book. Now most of the letters are illegible. How will Santa now know who is groovy and who is unspeakable?
Challenge
There was once a sequence of words, like this:
groovy groovy groovy unspe... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
Santa and the Elves are secretly preparing for a new tourist train service, called "North Pole Railroads". The train will travel through various sightseeing spots near the North Pole.
As a part of this project, they want to know how ma... |
Let's say I have this string:
s = "Code Golf! I love Code Golf. It is the best."
I want to replace all the vowels with repeated "aeiou".
Notes:
Uppercase vowels should be replaced by an uppercase letter, and lowercase vowels should be replaced by a lowercase letter.
Consonants (all alphabet characters except for "ae... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
challenge idea by emanresu A
Santa has a bunch of presents wrapped in cuboid boxes of various sizes. As his sled flies above a chimney, a stack of presents will be automatically dropped through it. Santa wants to carefully choose the p... |
Strassen's algorithm was the first method of matrix multiplication in subcubic time complexity, namely O(n**log2(7)) for a pair of n*n matrices (assuming the numbers therein are large enough that their O(n*log2(n)) exact multiplication has become the constraint on your performance, and any nested structures and functio... |
Challenge:
Given the input number n. It should give me nested sublists of n layers with the power of two numbers for each level. Each power of two value will be in separate sublists.
Notes:
n will always be greater than 0
I am using the example output with Python Lists. You can use any type of sequence in your own la... |
Challenge
Given a string of any length which contains only digits from 0 to 9, replace each consecutive run of the digit 0 with its length.
Test Cases
1234500362000440 → 1234523623441
123450036200044 → 123452362344
000000000000 → 12
0123456789 → 1123456789
1234567890 → 1234567891
123456789 → 123456789
010203004050 → 1... |
Given an 8086 segmented ("logical") memory address, output its actual linear physical address.
A segmented memory address has format xxxx:xxxx, where each of x is one of 0-9A-F, and the two parts are parsed as hexadecimal integers. Both parts are exactly 4 digits.
To get its actual linear address, multiply the first pa... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
Santa has a bunch of presents wrapped in cuboid boxes of various sizes. As his sled flies above a chimney, a stack of presents will be automatically dropped through it. Santa wants to carefully choose the presents so that all of them f... |
Challenge:
Given the input array l with a list of strings, only keep the elements in the sequence that have a letter that's repeated at least 3 times. Like 'lessons' has 3 s letters, so it should be kept in the sequence. But, 'lesson' has only two s letters, so it should be removed.
Notes:
l will always be a sequence,... |
Task
A pure mirror checkmate is a checkmate position, where the mated king is surrounded by 8 empty squares which are attacked or guarded by the winning side exactly once. You will be given a valid chess position where Black is in mate. Your task is to find if that mate is a pure mirror checkmate.
Examples (click for l... |
Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details.
Santa and the Elves are secretly preparing for a new tourist train service, called "North Pole Railroads". The train will travel through various sightseeing spots near the North Pole.
As a part of this project, they want to know how ma... |
Scientists have made contact with a parallel universe. Just one problem: They write math differently. Help the scientists make a program that can convert normal math expressions to their equivalent in alternate universe math. The connection through the portal is bad so your code needs to be as short as possible
Given a... |
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