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Challenges

Code challenges of all types. For questions about golfing, bowling, etc, use Q&A. For questions about this community, use Meta. To get feedback on a challenge before posting it, use Sandbox.

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77%
+5 −0
Guess the language! (Cops' Thread)

ROBBERS' THREAD A famous cops-and-robbers challenge whose source shall remain unnamed is brought to Codidact. You are a cop. You should write a program in a "famous" (has an English Wikipedia/Eso...

16 answers  ·  posted 3y ago by AndrewTheCodegolfer‭  ·  last activity 3y ago by Shaggy‭

71%
+3 −0
Guess the language! (Robbers' Thread)

COPS THREAD A famous cops-and-robbers challenge whose source shall remain unnamed is brought to Codidact. You are a robber. Your goal is to find answers on this link which haven't been cracked an...

12 answers  ·  posted 3y ago by AndrewTheCodegolfer‭  ·  last activity 3y ago by m90‭

81%
+7 −0
Backspace an array

Challenge Given an array consisting of positive integers and 0s, return it with 0s acting like backspaces. Leading backspaces do nothing, and more backspaces than elements also does nothing. Cre...

6 answers  ·  posted 3y ago by rak1507‭  ·  last activity 3y ago by Shaggy‭

77%
+5 −0
Gamer Meme Creator

Challenge You will be given a string and an ascii art as input. The string must be placed above the ascii art, and centered based on its longest line. The text BOTTOM TEXT must be placed below...

4 answers  ·  posted 3y ago by Razetime‭  ·  last activity 3y ago by user‭

71%
+3 −0
Three Number Monte

The Rules In this game, each round, every player faces off against every other player in a round robin format. In each match, players pick 3 positive integers that sum to 360. Let's say player 1 p...

2 answers  ·  posted 3y ago by Quintec‭  ·  last activity 3y ago by Moshi‭

77%
+5 −0
Add two negabinary integers

About Negabinary Negabinary means base negative two (-2). That is, the $n$th place value is determined by $(-2)^n$. Negabinary numbers can be evaluated just like any other base system. For exampl...

3 answers  ·  posted 3y ago by Moshi‭  ·  last activity 3y ago by Shaggy‭

60%
+1 −0
Recreate the Server Fault logo

Make the Server Fault logo using the following criteria: The boxes' measurements: There are 3 columns of 5 boxes, with long ones at the left where the rest are regular. The following measure...

0 answers  ·  posted 3y ago by General Sebast1an‭

77%
+5 −0
Create a Sudoku

Write the shortest program that takes no input and outputs a Sudoku solution. For reference, a Sudoku solution is a 9x9 grid of digits where each column, each row and each of the nine 3x3 grids th...

4 answers  ·  posted 3y ago by AndrewTheCodegolfer‭  ·  last activity 3y ago by Shaggy‭

81%
+7 −0
Evaluation order of an APL n-train

Description APL trains are a series of functions, that get applied to an argument in this way: (f g) x = f g x (f g h) x = (f x) g (h x) (a b c d e f) x = (a (b c (d e f))) x = a (b x) c (d x) ...

7 answers  ·  posted 3y ago by rak1507‭  ·  last activity 3y ago by Shaggy‭

77%
+5 −0
Longest parallel lines

Note: This challenge was underspecified and bad, and as such I would not encourage answering it in the future. Challenge You will be given a single 2D boolean array $M$. You may take its dimensi...

1 answer  ·  posted 4y ago by rak1507‭  ·  edited 3y ago by rak1507‭

87%
+12 −0
Print the Great Numeric Pyramid

Print or return this exact text: 0 0 0 0 1 0 0 1 1 0 0 1 2 1 0 ...

5 answers  ·  posted 4y ago by Sisyphus‭  ·  last activity 3y ago by Marshall Lochbaum‭

71%
+3 −0
Really Cool Numbers

Define a cool number as a number whose proper divisors (all except for the number itself) have an integral mean. Define a really cool number as a number whose divisors (including itself) are all co...

3 answers  ·  posted 3y ago by Quintec‭  ·  last activity 3y ago by user‭

75%
+4 −0
Calculate a person's age

Challenge Given a date with day, month and year, calculate how old a person born on that day would be today. Input can be in any reasonable format(params, array, date object). Input will never b...

0 answers  ·  posted 4y ago by Razetime‭

83%
+8 −0
Integer to Roman numeral

The task is to take a decimal integer as input and print the corresponding Roman numeral with capital letters. The program must handle all positive integer numbers between 1 and 1000. Input can be...

3 answers  ·  posted 4y ago by Lundin‭  ·  last activity 4y ago by Lundin‭