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
7
Arrays
10
Binary
45
Bits
16
Data Structures
1
Fundamentals
45
Lists
3
Logic
1
Mathematics
3
Networks
7
Parsing
1
Puzzles
2
Regular Expressions
2
Sorting
2
Strings
8
FEATURED TAGS
Cryptography
Data Science
Debugging
Games
Tutorials
45 Kata Found
6 kyu
Networking 101/3: Find the number of valid Hosts in a Subnet
116
bitcanon
Networks
Bits
Fundamentals
Binary
6 kyu
Parity bit - Error detecting code
1,031
pshp
Algorithms
Binary
Strings
Fundamentals
7 kyu
Binary Addition
192,628
garrettguy457
Binary
Fundamentals
7 kyu
Bits Battle
2,264
vpop
1 Issue Reported
Fundamentals
Binary
Bits
6 kyu
Convert integer to Whitespace format
1,941
MMMAAANNN
Binary
Fundamentals
6 kyu
IEEE 754 floating point numbers
482
trashy_incel
Binary
Fundamentals
6 kyu
Binary to Text (ASCII) Conversion
5,620
deanvn
4 Issues Reported
Binary
Strings
Fundamentals
7 kyu
Regexp Basics - is it a eight bit signed number?
1,032
taw
3 Issues Reported
Bits
Binary
Strings
Regular Expressions
Fundamentals
5 kyu
7-segment converter
709
wthit56
Binary
Bits
Fundamentals
7 kyu
Shared Bit Counter
2,447
Anarki
Fundamentals
Binary
Bits
6 kyu
Classify a floating point number
161
trashy_incel
1 Issue Reported
Binary
Fundamentals
7 kyu
ORing arrays
1,743
GiacomoSorbi
1 Issue Reported
Arrays
Lists
Binary
Fundamentals
6 kyu
Basics 09: Shifting Bits, right...?
300
smile67
Mathematics
Fundamentals
Binary
6 kyu
Basics 10: Shifting Bits, left...?
274
smile67
1 Issue Reported
Mathematics
Fundamentals
Binary
Algorithms
7 kyu
Most-1-bits
88
UK-06
Fundamentals
Bits
Arrays
Lists
Binary
7 kyu
Positive to negative binary numbers
789
danCompSci
1 Issue Reported
Binary
Arrays
Fundamentals
6 kyu
Adding Binary Numbers
1,380
DivyanshBatham
1 Issue Reported
Binary
Bits
Fundamentals
6 kyu
Grill it!
1,352
dcieslak
Strings
Binary
Fundamentals
6 kyu
World Bits War
1,404
GiacomoSorbi
Bits
Binary
Arrays
Fundamentals
7 kyu
Password Check - Binary to String
1,548
user261601
Binary
Strings
Arrays
Fundamentals
7 kyu
Convert Integer to Binary
2,055
DivyanshBatham
Binary
Fundamentals
7 kyu
Evens and Odds
7,238
ocirion
Fundamentals
Binary
6 kyu
IPv4 to int32
11,171
sahglie
Networks
Algorithms
Bits
Binary
Fundamentals
8 kyu
Bin to Decimal
34,161
wichu
3 Issues Reported
Binary
Fundamentals
7 kyu
Networking 101/2: Identify the IPv4 address Class
501
bitcanon
Networks
Bits
Fundamentals
Binary
6 kyu
Sorting by bits
9,450
kodejuice
Logic
Arrays
Algorithms
Data Structures
Fundamentals
Bits
Binary
Sorting
8 kyu
Arguments to Binary addition
3,490
Javatlacati
1 Issue Reported
Arrays
Binary
Fundamentals
7 kyu
Odd March Bits 8 bits
1,745
rhnh
1 Issue Reported
Bits
Binary
Arrays
Fundamentals
7 kyu
Single digit
3,059
hamurai
Binary
Fundamentals
7 kyu
Sum Array with different bases
905
phju
1 Issue Reported
Binary
Arrays
Lists
Fundamentals
Loading...
Confirm
Collect:
undefined
Loading collection data...