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
46
Arrays
15
Binary
106
Binary Search Trees
1
Bits
36
Ciphers
1
Cryptography
2
Data Structures
3
Fundamentals
45
Lists
5
Logic
3
Mathematics
12
Networks
8
Parsing
3
Performance
5
Puzzles
11
Recursion
1
Refactoring
1
Reflection
1
Regular Expressions
3
Sets
1
Sorting
3
Strings
19
Trees
1
Unicode
1
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
106 Kata Found
7 kyu
Count the Ones
3,561
rodentrabies
1 Issue Reported
Binary
Algorithms
7 kyu
Delta Bits
3,382
ykagan
1 Issue Reported
Bits
Binary
Algorithms
7 kyu
Bits Battle
2,227
vpop
1 Issue Reported
Fundamentals
Binary
Bits
6 kyu
Convert integer to Whitespace format
1,918
MMMAAANNN
Binary
Fundamentals
5 kyu
Base -2
1,051
sergiogarciadev
1 Issue Reported
Algorithms
Binary
6 kyu
IEEE 754 floating point numbers
470
trashy_incel
Binary
Fundamentals
7 kyu
Pernicious Numbers
695
AcesOfGlory
2 Issues Reported
Arrays
Binary
Algorithms
7 kyu
Greatest Common Divisor Bitcount
1,153
obnounce
1 Issue Reported
Binary
Algorithms
6 kyu
Santa's Missing Gift List
620
omegahm
Binary
Algorithms
6 kyu
Binary to Text (ASCII) Conversion
5,563
deanvn
4 Issues Reported
Binary
Strings
Fundamentals
7 kyu
Regexp Basics - is it a eight bit signed number?
1,011
taw
3 Issues Reported
Bits
Binary
Strings
Regular Expressions
Fundamentals
5 kyu
Rule 30
889
MircoT
1 Issue Reported
Lists
Arrays
Binary
Puzzles
7 kyu
Binary scORe
1,516
NaMe613
1 Issue Reported
Binary
Algorithms
7 kyu
Binary sXORe
944
NaMe613
Binary
Algorithms
7 kyu
Sort by binary ones
1,168
guumaster
Arrays
Lists
Algorithms
Sorting
Binary
Bits
6 kyu
Boolean function truth table
355
trashy_incel
Bits
Binary
Reflection
7 kyu
Interlocking Binary Pairs
3,264
rowcased
Binary
Bits
Algorithms
5 kyu
Count Obeying Bitmasks In The Range
27
Jomopipi
Mathematics
Binary
Bits
5 kyu
Simple Fun #266: K Bits Digits
103
myjinxin2015
1 Issue Reported
Algorithms
Bits
Binary
5 kyu
7-segment converter
697
wthit56
Binary
Bits
Fundamentals
Beta
Translate from Trinary
14
oso0824
Status:
Testing & feedback needed
Estimated Rank:
6 kyu
Binary
7 kyu
Shared Bit Counter
2,413
Anarki
Fundamentals
Binary
Bits
6 kyu
Classify a floating point number
159
trashy_incel
1 Issue Reported
Binary
Fundamentals
6 kyu
Parity bit - Error detecting code
897
pshp
Algorithms
Binary
Strings
Fundamentals
7 kyu
ORing arrays
1,732
GiacomoSorbi
1 Issue Reported
Arrays
Lists
Binary
Fundamentals
6 kyu
Binary string
902
ssineriz
1 Issue Reported
Bits
Binary
Algorithms
6 kyu
IPv4 Parser
619
icaruspassion
2 Issues Reported
Networks
Binary
Bits
Mathematics
Algorithms
6 kyu
(De)Serialize and (De)Compress!
52
EatYourBeetS
Binary
Bits
Algorithms
6 kyu
Basics 09: Shifting Bits, right...?
294
smile67
Mathematics
Fundamentals
Binary
6 kyu
Basics 10: Shifting Bits, left...?
272
smile67
1 Issue Reported
Mathematics
Fundamentals
Binary
Algorithms
Loading...
Confirm
Collect:
undefined
Loading collection data...