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
57
Arrays
57
Binary
1
Binary Trees
1
Bits
1
Combinatorics
1
Data Science
1
Data Structures
57
Dynamic Programming
1
Functional Programming
19
Fundamentals
28
Games
1
Graph Theory
1
Lists
10
Logic
4
Mathematics
9
Matrix
3
Memoization
1
Performance
5
Puzzles
1
Recursion
2
Regular Expressions
7
Sorting
6
Strings
17
Trees
1
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
57 Kata Found
6 kyu
Get Password from grid
916
kodejuice
Logic
Arrays
Algorithms
Data Structures
6 kyu
Find the most frequently occurring elements in arrays
495
PiotrBerebecki
Algorithms
Data Structures
Arrays
Data Science
6 kyu
Coding Meetup #10 - Higher-Order Functions Series - Create usernames
3,509
PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Strings
7 kyu
Coding Meetup #4 - Higher-Order Functions Series - Find the first Python developer
10,391
PiotrBerebecki
1 Issue Reported
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Strings
Regular Expressions
7 kyu
Coding Meetup #2 - Higher-Order Functions Series - Greet developers
12,858
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
16,630
PiotrBerebecki
1 Issue Reported
Data Structures
Fundamentals
Algorithms
Strings
Regular Expressions
Arrays
Functional Programming
7 kyu
Coding Meetup #3 - Higher-Order Functions Series - Is Ruby coming?
11,141
PiotrBerebecki
1 Issue Reported
Data Structures
Fundamentals
Algorithms
Strings
Regular Expressions
Arrays
Functional Programming
6 kyu
Update inventory in your smartphone store
1,007
PiotrBerebecki
Algorithms
Data Structures
Arrays
5 kyu
Faulty Data Recovery
138
guioconnor
Arrays
Algorithms
Mathematics
Data Structures
7 kyu
Sectional Array Sort
1,591
kodejuice
1 Issue Reported
Arrays
Sorting
Data Structures
Algorithms
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
7 kyu
Parts of a list
18,072
g964
1 Issue Reported
Arrays
Lists
Data Structures
Algorithms
5 kyu
The Primes as a Result of the Longest Consecutive Sum I
197
raulbc777
Performance
Algorithms
Mathematics
Data Structures
Arrays
Fundamentals
6 kyu
Simple Fun #170: Sum Groups
1,100
myjinxin2015
2 Issues Reported
Arrays
Algorithms
Lists
Data Structures
Beta
Balancing Ratios
23
timothy-s-dev
3 Issues Reported
Status:
Testing & feedback needed
Estimated Rank:
7 kyu
Algorithms
Arrays
Mathematics
Data Structures
7 kyu
How many points did the teams from Los Angeles score?
955
PiotrBerebecki
Algorithms
Data Structures
Arrays
Regular Expressions
4 kyu
Expanding Dependency Chains
179
timothy-s-dev
Arrays
Data Structures
Algorithms
Graph Theory
Beta
Check and Mate?
483
Zirgion
2 Issues Reported
Status:
Waiting for issues to be resolved
Estimated Rank:
2 kyu
Logic
Arrays
Data Structures
Games
Algorithms
7 kyu
Coding Meetup #17 - Higher-Order Functions Series - Sort by programming language
2,166
PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
Sorting
5 kyu
Numbers with The Highest Amount of Divisors
608
raulbc777
4 Issues Reported
Fundamentals
Algorithms
Data Structures
Mathematics
Arrays
7 kyu
Is Sator Square?
1,605
rowcased
Arrays
Data Structures
Algorithms
6 kyu
The takeWhile Function
2,471
jgdodson
2 Issues Reported
Functional Programming
Arrays
Algorithms
Lists
Data Structures
6 kyu
N smallest elements in original order
3,025
GiacomoSorbi
Arrays
Lists
Data Structures
Algorithms
5 kyu
Fun with trees: array to tree
3,722
janitormeir
Trees
Arrays
Binary Trees
Data Structures
Algorithms
6 kyu
Lexographic sort with a twist
99
Chris_Rands
Algorithms
Arrays
Sorting
Data Structures
8 kyu
Enumerable Magic #20 - Cascading Subsets
9,094
bellmyer
2 Issues Reported
Fundamentals
Lists
Data Structures
Arrays
Algorithms
7 kyu
Plastic Balance
629
Eyad Hantouli
Fundamentals
Algorithms
Lists
Data Structures
Arrays
7 kyu
Coding Meetup #5 - Higher-Order Functions Series - Prepare the count of languages
8,315
PiotrBerebecki
Functional Programming
Data Structures
Arrays
Fundamentals
Algorithms
6 kyu
Sorting by bits
9,448
kodejuice
Logic
Arrays
Algorithms
Data Structures
Fundamentals
Bits
Binary
Sorting
6 kyu
2D Cellular Neighbourhood - Part 2
186
sgerodes
1 Issue Reported
Algorithms
Data Structures
Arrays
Matrix
Loading...
Confirm
Collect:
undefined
Loading collection data...