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
Algorithms
16
Arrays
1
Binary Search Trees
4
Binary Trees
4
Data Structures
18
Dynamic Programming
2
Fundamentals
5
Graph Theory
1
Graphs
1
Linked Lists
1
Lists
1
Logic
1
Mathematics
7
Performance
1
Recursion
18
Regular Expressions
1
Sorting
1
Stacks
1
Strings
3
Trees
8
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
18 Kata Found
5 kyu
Working With Coloured Numbers
398
raulbc777
2 Issues Reported
Fundamentals
Data Structures
Algorithms
Mathematics
Logic
Strings
Recursion
Dynamic Programming
5 kyu
Sequence of Power Digits Sum
533
raulbc777
1 Issue Reported
Algorithms
Recursion
Data Structures
Mathematics
5 kyu
Fun with trees: is perfect
1,658
janitormeir
3 Issues Reported
Trees
Recursion
Binary Trees
Binary Search Trees
Data Structures
Algorithms
6 kyu
Fun with trees: max sum
4,630
janitormeir
Trees
Recursion
Binary Trees
Binary Search Trees
Data Structures
Algorithms
6 kyu
Closed Brackets String
207
saudiGuy
Algorithms
Strings
Recursion
Stacks
Dynamic Programming
Data Structures
6 kyu
Product Partitions II
58
raulbc777
1 Issue Reported
Fundamentals
Data Structures
Mathematics
Recursion
Algorithms
5 kyu
Give me the Corresponding Proper Fraction!
72
raulbc777
Performance
Algorithms
Mathematics
Data Structures
Strings
Recursion
6 kyu
Inner Calls In Recursion I
171
raulbc777
1 Issue Reported
Fundamentals
Data Structures
Algorithms
Mathematics
Recursion
5 kyu
Binary Tree Traversal
2,274
Ban-Ath
1 Issue Reported
Binary Trees
Trees
Recursion
Data Structures
Algorithms
6 kyu
Activate a Node in a Tree
30
dfhwze
Trees
Algorithms
Graphs
Graph Theory
Data Structures
Recursion
5 kyu
Lisp Combination Trees
40
user2420289
2 Issues Reported
Trees
Recursion
Regular Expressions
Mathematics
Data Structures
Algorithms
6 kyu
Array Hyperrectangularity
66
sgerodes
Mathematics
Arrays
Recursion
Algorithms
Data Structures
Lists
5 kyu
Binary search tree validation
1,000
plastic
1 Issue Reported
Trees
Recursion
Data Structures
Algorithms
6 kyu
Sum The Tree
4,931
jz9000
1 Issue Reported
Trees
Recursion
Binary Trees
Binary Search Trees
Data Structures
Fundamentals
6 kyu
Tree Directory
121
user2420289
1 Issue Reported
Data Structures
Binary Search Trees
Trees
Recursion
Algorithms
5 kyu
Recursive Ninja: Warlords edition
87
Voile
1 Issue Reported
Data Structures
Recursion
Algorithms
6 kyu
Linked Lists - Merge Sort
480
JDeBolt
1 Issue Reported
Linked Lists
Data Structures
Algorithms
Sorting
Recursion
5 kyu
String tree-ification
143
joh_pot
1 Issue Reported
Data Structures
Recursion
Fundamentals
Confirm
Collect:
undefined
Loading collection data...