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5 kyu
Rot13
90,356Rubikan
Ciphers
Fundamentals
3 kyu
Rail Fence Cipher: Encoding and Decoding
8,433darrentburgess
Algorithms
Ciphers
Cryptography
Strings
Security
4 kyu
Snail
74,686stevenbarragan
Arrays
Algorithms
6 kyu
Texting with an old-school mobile phone
875B1ts
Fundamentals
Strings
Algorithms
5 kyu
Is the King in check ?
1,412trashy_incel
Games
Arrays
Strings
Algorithms
4 kyu
Vigenère Cipher Helper
8,138jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
5 kyu
Interlaced Spiral Cipher
385docgunthrop
Ciphers
Strings
Algorithms
5 kyu
[BF] Divmod
51Bubbler
Fundamentals
Esoteric Languages
Puzzles
6 kyu
[BF] Simple square root
26ozichukwu
Algorithms
Fundamentals
6 kyu
[Code Golf] BF for finding ASCII value
32___i
Esoteric Languages
Strings
Restricted
6 kyu
Decode the QR-Code
379zLuki
Algorithms
4 kyu
Create the QR-Code
115zLuki
Mathematics
Algorithms
3 kyu
Binomial Expansion
6,018TheDoctor
Mathematics
Algebra
Algorithms
6 kyu
Do not let him go
248user2553318
Strings
Arrays
Algorithms
5 kyu
Langton's Ant - Advanced Version
58anter69
Mathematics
Performance
Algorithms
4 kyu
Explosive Sum
8,386surtich
Algorithms
Mathematics
Fundamentals
5 kyu
Break the Caesar!
718kingcobra
Ciphers
Cryptography
Fundamentals
5 kyu
Unusual Cipher
103G_kuldeep
Ciphers
Fundamentals
3 kyu
Breaking the Vigenère Cipher
363petermaier1
Ciphers
Cryptography
Algorithms
6 kyu
[BF] RGB Hexadecimal to Decimal
29iNont
Fundamentals
Algorithms
Strings
Mathematics
4 kyu
Escape the maze
807cyril-lemaire
Fundamentals
Algorithms
3 kyu
Screen Locking Patterns
4,553rsalgado
Mathematics
Combinatorics
Geometry
Algorithms
Graph Theory
6 kyu
Maximum Depth of Nested Brackets
518nachoMonllor
Strings
Performance
Algorithms
4 kyu
Roman Numerals Helper
29,252jhoffner
Algorithms
Object-oriented Programming
4 kyu
Twice linear
22,515g964
Mathematics
Algorithms
4 kyu
Count ones in a segment
3,023d0n14
Binary
Performance
Algorithms
4 kyu
Balanced parentheses string
104ecolban
Algorithms
Dynamic Programming
4 kyu
Area of House from Path of Mouse
137docgunthrop
Strings
Puzzles
Algorithms
3 kyu
Alphametics Solver
412docgunthrop
Puzzles
Performance
Cryptography
Algorithms
2 kyu
Evaluate mathematical expression
9,380ankr
Mathematics
Parsing
Algorithms
5 kyu
Rectangle into Rectangles
230elzoughby
Puzzles
Fundamentals
Algorithms
Geometry
5 kyu
Best travel
20,375g964
Fundamentals
6 kyu
[BF] To UpperCase
54iNont
Fundamentals
Algorithms
Strings
6 kyu
[BF] Reverse Multiple Strings
41iNont
Fundamentals
Algorithms
Strings
6 kyu
[BF] Sum 0 to N
57iNont
Fundamentals
Algorithms
Mathematics
5 kyu
[BF] Draw Triangle
56iNont
Fundamentals
Algorithms
Strings
5 kyu
[BF] Is Palindrome?
22iNont
Fundamentals
Algorithms
Strings
4 kyu
Ranking Poker Hands
3,237FrankK
Games
Algorithms
Object-oriented Programming
3 kyu
Alphabetic Anagrams
6,107Azuaron
Mathematics
Logic
Strings
Algorithms
4 kyu
NIM the game
840xcthulhu
Mathematics
Games
Puzzles
6 kyu
Duplicate Encoder
217,467obnounce
Strings
Arrays
Fundamentals
6 kyu
Numericals of a String
3,330Jomopipi
Puzzles
Performance
Algorithms
4 kyu
Large Factorials
9,016matt c
Algorithms
Big Integers
3 kyu
Divide integers as strings
966Voile
Strings
Fundamentals
Big Integers
Algorithms
6 kyu
Round and Round
905Voile
Fundamentals
Debugging
6 kyu
Cat Kata, Part 1
1,531tachyonlabs
Mathematics
Fundamentals
5 kyu
Bananas
1,054dinglemouse
Strings
Algorithms
4 kyu
Find the unknown digit
8,032JJ-Bug
Mathematics
Algorithms
Puzzles
3 kyu
Make a spiral
14,416Bugari
Algorithms
Arrays
Logic
5 kyu
Rotate a square matrix like a vortex
557user5036852
Logic
Arrays
Algorithms
Matrix
5 kyu
Coding with Squared Strings
2,035g964
Fundamentals
Strings
Ciphers
Cryptography
3 kyu
Find the cheapest path
541FArekkusu
Algorithms
Performance
5 kyu
Phone Directory
6,679g964
Fundamentals
Strings
6 kyu
Your order, please
166,286iamstone
Strings
Fundamentals
6 kyu
Convert string to camel case
188,355jhoffner
Regular Expressions
Algorithms
Strings
4 kyu
parseInt() reloaded
17,249BattleRattle
Parsing
Strings
Algorithms
6 kyu
Driving Circles
81newsh
Fundamentals
5 kyu
Bird Mountain
1,753dinglemouse
Algorithms
Graph Theory
5 kyu
Snake Collision
128kodejuice
Arrays
Games
Algorithms
Simulation
Puzzles
6 kyu
Collision Detection - 2D Point in 2D Rectangle
60Souzooka
Mathematics
Geometry
Algorithms
4 kyu
Most frequently used words in a text
27,412markprzepiora
Strings
Filtering
Algorithms
Regular Expressions
5 kyu
Find the smallest
5,418g964
Fundamentals
5 kyu
Histogram - V2
147dinglemouse
Fundamentals
5 kyu
Second Variation on Caesar Cipher
1,875g964
Fundamentals
Ciphers
Cryptography
6 kyu
Simple Encryption #1 - Alternating Split
28,217user5036852
Cryptography
Algorithms
Strings
Arrays
Fundamentals
6 kyu
Tetris Series #2 — Primitive Gameplay
306Etoneja
Fundamentals
Games
Algorithms
Arrays
Logic
4 kyu
Longest Common Subsequence (Performance version)
2,354JohanWiltink
Performance
Strings
Dynamic Programming
Memoization
Algorithms
4 kyu
Burrows-Wheeler-Transformation
1,899muesli4
Lists
Puzzles
Algorithms
1 kyu
7×7 Skyscrapers
1,942JohanWiltink
Algorithms
Games
Performance
5 kyu
Nut Farm 2
381dinglemouse
Algorithms
6 kyu
Connect the Dots
345dinglemouse
Fundamentals
4 kyu
Regular expression for binary numbers divisible by 5
2,182aswitalski
Binary
Algorithms
Regular Expressions
2 kyu
Regular Expression - Check if divisible by 0b111 (7)
2,155Hacker Sakana
Puzzles
Regular Expressions
Strings
Algorithms