Kata Library
Sign Up
Time to claim your honor
Training
Practice
Complete challenging
Kata
to earn honor and ranks. Re-train to hone technique
Freestyle Sparring
Take turns remixing and refactoring others code through
Kumite
Community
Leaderboards
Achieve honor and move up the global leaderboards
Chat
Join our
Discord
server and chat with your fellow code warriors
Discussions
View our
Github Discussions
board to discuss general Codewars topics
About
Docs
Learn about all of the different aspects of Codewars
Blog
Read the latest news from Codewars and the community
Log In
Sign Up
Library
Collections
Newest
Oldest
Popularity
Positive Feedback
Most Completed
Least Completed
Hardest
Easiest
Name
Relevance
Low Satisfaction
All
My Languages
Agda (Beta)
BF (Beta)
C
CFML (Beta)
Clojure
COBOL (Beta)
CoffeeScript
CommonLisp (Beta)
Coq
C++
Crystal
C#
D (Beta)
Dart
Elixir
Elm (Beta)
Erlang (Beta)
Factor (Beta)
Forth (Beta)
Fortran (Beta)
F#
Go
Groovy
Haskell
Haxe (Beta)
Idris (Beta)
Java
JavaScript
Julia (Beta)
Kotlin
λ Calculus (Beta)
Lean
Lua
NASM
Nim (Beta)
Objective-C (Beta)
OCaml (Beta)
Pascal (Beta)
Perl (Beta)
PHP
PowerShell (Beta)
Prolog (Beta)
PureScript (Beta)
Python
R (Beta)
Racket
Raku (Beta)
Reason (Beta)
RISC-V (Beta)
Ruby
Rust
Scala
Shell
Solidity (Beta)
SQL
Swift
TypeScript
VB (Beta)
Approved & Beta
Approved
Beta
All
Kata I have not trained on
Kata I have not completed
Kata I have completed
8 kyu
easiest
7 kyu
6 kyu
5 kyu
4 kyu
3 kyu
2 kyu
1 kyu
hardest
Algebra
1
Algorithms
117
Arrays
117
Binary
2
Bits
2
Ciphers
1
Combinatorics
1
Cryptography
3
Data Science
1
Data Structures
28
Dynamic Programming
1
Functional Programming
18
Fundamentals
117
Games
6
Geometry
1
Iterators
1
Lists
9
Logic
7
Mathematics
15
Memoization
2
Parsing
3
Performance
10
Physics
1
Puzzles
4
Recursion
2
Regular Expressions
9
Security
2
Sorting
12
Strings
34
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
117 Kata Found
7 kyu
Coding Meetup #4 - Higher-Order Functions Series - Find the first Python developer
10,270
PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Strings
Regular Expressions
7 kyu
Coding Meetup #2 - Higher-Order Functions Series - Greet developers
12,739
PiotrBerebecki
Data Structures
Fundamentals
Algorithms
Strings
Regular Expressions
Arrays
Functional Programming
7 kyu
Coding Meetup #1 - Higher-Order Functions Series - Count the number of JavaScript developers coming from Europe
16,461
PiotrBerebecki
Data Structures
Fundamentals
Algorithms
Strings
Regular Expressions
Arrays
Functional Programming
8 kyu
Count the Monkeys!
73,284
PG1
1 Issue Reported
Arrays
Fundamentals
Lists
Algorithms
7 kyu
Coding Meetup #3 - Higher-Order Functions Series - Is Ruby coming?
11,058
PiotrBerebecki
Data Structures
Fundamentals
Algorithms
Strings
Regular Expressions
Arrays
Functional Programming
6 kyu
Find the unique number
153,654
isqua
4 Issues Reported
Fundamentals
Algorithms
Arrays
Performance
7 kyu
The Poet And The Pendulum
4,827
MrZizoScream
4 Issues Reported
Fundamentals
Arrays
Algorithms
Performance
7 kyu
Tetris Series #1 — Scoring System
1,931
Etoneja
1 Issue Reported
Fundamentals
Games
Algorithms
Arrays
5 kyu
Scrabble Checker
50
Paul Robertson
Algorithms
Games
Lists
Arrays
Fundamentals
6 kyu
Triangles made of random points
240
Muchacos
Mathematics
Geometry
Algorithms
Arrays
Performance
Fundamentals
Beta
Next Higher Value #3
15
raulbc777
1 Issue Reported
Status:
Waiting for issues to be resolved
Estimated Rank:
4 kyu
Performance
Algorithms
Mathematics
Data Structures
Arrays
Recursion
Memoization
Dynamic Programming
Fundamentals
5 kyu
The Primes as a Result of the Longest Consecutive Sum I
194
raulbc777
Performance
Algorithms
Mathematics
Data Structures
Arrays
Fundamentals
5 kyu
Flood Fill
366
chris_w
Algorithms
Fundamentals
Arrays
7 kyu
Mirror, mirror, on the wall...
3,363
David Gildour
Algorithms
Fundamentals
Arrays
7 kyu
Sports league table - help your local team!
490
mcelearr
2 Issues Reported
Fundamentals
Arrays
Algorithms
7 kyu
Pair Zeros
2,362
Nianpeng
Algorithms
Arrays
Fundamentals
Functional Programming
7 kyu
SCHEDULE YOUR DA(RRA)Y
1,429
alexis-l8
5 Issues Reported
Arrays
Algorithms
Mathematics
Fundamentals
6 kyu
Oracle: Coin Method
260
Aquila
Algorithms
Arrays
Sorting
Games
Fundamentals
7 kyu
The Raul Kata
139
user5036852
Algorithms
Strings
Arrays
Fundamentals
3 kyu
Do not loose at tic-tac-toe!
211
user5036852
Fundamentals
Arrays
Logic
Mathematics
Algorithms
7 kyu
Round To Nearest
324
Insight
2 Issues Reported
Arrays
Fundamentals
Algorithms
7 kyu
Simple Fun #399: Make Ascending Sequences
358
myjinxin2015
Fundamentals
Arrays
Algorithms
7 kyu
intTunes
504
cmistrata
1 Issue Reported
Arrays
Lists
Fundamentals
Algorithms
7 kyu
Coding Meetup #17 - Higher-Order Functions Series - Sort by programming language
2,150
PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Sorting
5 kyu
Numbers with The Highest Amount of Divisors
605
raulbc777
4 Issues Reported
Fundamentals
Algorithms
Data Structures
Mathematics
Arrays
5 kyu
Sports League Table Ranking
588
cshw89
Fundamentals
Algorithms
Arrays
Sorting
7 kyu
Histogram data
845
Jenik
1 Issue Reported
Fundamentals
Algorithms
Arrays
Data Science
5 kyu
Simple Encryption #2 - Index-Difference
882
user5036852
Fundamentals
Cryptography
Security
Strings
Arrays
Algorithms
7 kyu
Fizz Buzz
26,466
stephenyu
7 Issues Reported
Algorithms
Fundamentals
Arrays
6 kyu
Elimination Tournament
1,132
JOLee83
Arrays
Fundamentals
Algorithms
Loading...
Confirm
Collect:
undefined
Loading collection data...