🎯・challenges

BrainF*ck 30 messages

Feb 6, 2026, 12:41 AM Easy

String to Integer 2 messages

Oct 24, 2025, 2:23 AM Medium

Word Frequency from a list 43 messages

Oct 21, 2025, 2:25 PM Medium

Roman to Integer (LeetCode) 8 messages

Oct 3, 2025, 7:03 PM Medium

Very typical JavaScript 11 messages

May 29, 2025, 11:41 PM Easy

Release the expected C output 4 messages

Feb 28, 2025, 12:47 AM Easy

A bare-bone ink-jet printer 8 messages

Dec 26, 2024, 8:28 AM Easy

This, this and that 95 messages

Oct 17, 2024, 8:38 AM Medium Hard

42. Trapped water 6 messages

Sep 16, 2024, 4:35 AM Hard

Coin Sums 58 messages

Sep 5, 2024, 7:03 PM Medium Easy

Twin String comparison 2 messages

Jun 25, 2024, 4:49 AM Medium

Boxes of Balls Puzzle 6 messages

Jun 12, 2024, 2:47 AM Medium

Binary Clock 45 messages

Apr 24, 2024, 9:58 PM Easy

Optimized search for number of primes below a given input 14 messages

Mar 31, 2024, 6:00 AM Medium Hard

Pig Latin 44 messages

Mar 29, 2024, 4:42 PM Medium Easy

f(f(x)) == -x 72 messages

Mar 5, 2024, 6:16 AM Hard

RGB to Hex Conversion 60 messages

Feb 14, 2024, 7:14 PM Easy

Analysis of Algorithm [Big-O and Summation] 179 messages

Feb 6, 2024, 4:50 AM Easy

Launch Sequence for loop 12 messages

Feb 6, 2024, 2:22 AM Easy

Every Other Characters [Any Languages] 139 messages

Feb 1, 2024, 6:14 PM Easy

little tournament 23 messages

Jan 7, 2024, 5:11 AM Medium Easy

Create first+last name signature trim 9 messages

Dec 24, 2023, 5:02 PM Medium

Fast and Simple XSS Filter AlphaNumDashLower 18 messages

Dec 22, 2023, 6:46 PM Medium

Optimized Algorithm for Knight's Tour problem 7 messages

Dec 22, 2023, 9:25 AM Hard

QUIZ Time 2 messages

Dec 6, 2023, 5:29 AM Easy

finding pi from random points 6 messages

Nov 20, 2023, 12:11 AM Medium Hard

-1 = 0 24 messages

Nov 3, 2023, 11:56 PM Easy

Parsing C symbol is fun or NOT ? 12 messages

Nov 1, 2023, 5:26 PM Medium

Suguru Generator 2 messages

Oct 22, 2023, 7:11 AM Hard

C++ quiz time ♪ 76 messages

Oct 19, 2023, 11:46 AM Medium

Colored Triangle 16 messages

Jul 20, 2023, 6:31 PM Medium

Hacking NASA Meme 95 messages

Jul 18, 2023, 2:12 PM Easy

Longest Increasing Subsequence 18 messages

Jul 17, 2023, 3:47 PM Easy

Reverse word 28 messages

Jul 4, 2023, 10:07 PM Easy

Tally Mark 42 messages

Jul 4, 2023, 6:59 PM Easy

Python Useless Function 17 messages

May 27, 2023, 6:57 PM Easy

Find the smallest 9 messages

May 9, 2023, 2:33 AM Hard

Pagination Helper 4 messages

May 9, 2023, 2:22 AM Easy

Robot fireplace challenge 3 messages

Feb 24, 2023, 6:07 PM Medium Easy

Pouring water on uneven concrete for no particular reason 5 messages

Feb 17, 2023, 6:09 PM Hard

O(n) Fibonacci of n 64 messages

Feb 17, 2023, 5:48 PM Medium

Bracket balancing 113 messages

Feb 16, 2023, 5:41 PM Easy

Limited toolset 242 messages

Feb 14, 2023, 10:08 AM Hard

Create sub-lists from input 104 messages

Feb 14, 2023, 6:17 AM Medium Easy