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
ASCII Art
1
Algorithms
112
Arrays
17
Binary
1
Binary Search Trees
4
Binary Trees
5
Bits
1
Combinatorics
1
Data Science
1
Data Structures
19
Dynamic Programming
7
Functional Programming
4
Fundamentals
20
Game Solvers
1
Geometry
2
Graph Theory
3
Graphs
1
Interpreters
1
Linear Algebra
1
Linked Lists
3
Lists
8
Logic
3
Mathematics
25
Matrix
1
Memoization
3
Number Theory
8
Object-oriented Programming
1
Parsing
3
Performance
16
Permutations
2
Physics
2
Puzzles
6
Queues
1
Recursion
112
Regular Expressions
2
SQL
1
Searching
1
Set Theory
2
Sets
1
Sorting
2
Stacks
2
Statistics
1
Strings
10
Theorem Proving
1
Trees
14
Tutorials
1
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
112 Kata Found
4 kyu
Matrix Determinant
24,252
pjfranzini
8 Issues Reported
Matrix
Linear Algebra
Mathematics
Recursion
Algorithms
4 kyu
Hash.flattened_keys
692
lunitik
Recursion
Algorithms
6 kyu
Mutual Recursion
8,673
dnolan
1 Issue Reported
Mathematics
Algorithms
Recursion
7 kyu
nova polynomial 4. derivative
382
hgamboa
1 Issue Reported
Algorithms
Recursion
Arrays
6 kyu
Look and say numbers
2,625
Svenito
Recursion
Algorithms
7 kyu
Recursive Replication
4,176
karthikiyengar
2 Issues Reported
Recursion
Algorithms
6 kyu
Tiling a square with squares
62
Paul Robertson
Fundamentals
Algorithms
Recursion
Performance
5 kyu
Working With Coloured Numbers
392
raulbc777
2 Issues Reported
Fundamentals
Data Structures
Algorithms
Mathematics
Logic
Strings
Recursion
Dynamic Programming
5 kyu
Sequence of Power Digits Sum
526
raulbc777
1 Issue Reported
Algorithms
Recursion
Data Structures
Mathematics
7 kyu
Reduce My Fraction
4,539
SavageWilliam
Fundamentals
Recursion
Algorithms
5 kyu
Almost Isosceles Integer Triangles With Their Angles With Asymptotic Tendency
70
raulbc777
Algorithms
Performance
Number Theory
Recursion
Geometry
Fundamentals
5 kyu
Tree Reconstruction
313
benmathes
1 Issue Reported
Algorithms
Trees
Recursion
6 kyu
Dragon's Curve
1,033
user3482173
2 Issues Reported
Mathematics
Recursion
Algorithms
6 kyu
Ackermann Function
3,900
user3482173
4 Issues Reported
Mathematics
Algorithms
Recursion
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
Fibo akin
1,990
g964
4 Issues Reported
Algorithms
Recursion
5 kyu
Tree leaves at same level
341
jlordiales
1 Issue Reported
Trees
Recursion
Algorithms
5 kyu
Langton's ant
479
St3f4n
1 Issue Reported
Recursion
Algorithms
7 kyu
Sum of a nested list
3,174
kingcobra
Recursion
Lists
Algorithms
Fundamentals
Beta
Graph Theory: Detect an arborescence
16
chris_w
3 Issues Reported
Status:
Testing & feedback needed
Estimated Rank:
5 kyu
Algorithms
Mathematics
Data Structures
Recursion
4 kyu
The smallest number with a given number of divisors
163
user8729270
Mathematics
Recursion
Algorithms
Number Theory
Performance
6 kyu
Levels of Pascal's Pyramid
98
kylito
Arrays
Algorithms
Mathematics
Combinatorics
Recursion
5 kyu
A self-descriptive fractal sequence
95
Paul Robertson
Algorithms
Lists
Number Theory
Recursion
5 kyu
Hofstadter's Figure-Figure sequence
106
Paul Robertson
Lists
Algorithms
Recursion
Performance
6 kyu
Odder than the rest
315
JohanWiltink
Puzzles
Algorithms
Recursion
6 kyu
Fibonacci on roids
521
GiacomoSorbi
1 Issue Reported
Recursion
Lists
Arrays
Algorithms
4 kyu
The fusc function -- Part 2
1,077
ecolban
1 Issue Reported
Algorithms
Recursion
5 kyu
Fun with trees: is perfect
1,649
janitormeir
3 Issues Reported
Trees
Recursion
Binary Trees
Binary Search Trees
Data Structures
Algorithms
6 kyu
Parse a linked list from a string
2,452
donaldsebleung
1 Issue Reported
Linked Lists
Recursion
Algorithms
6 kyu
Fun with trees: max sum
4,617
janitormeir
Trees
Recursion
Binary Trees
Binary Search Trees
Data Structures
Algorithms
Loading...
Confirm
Collect:
undefined
Loading collection data...