Kata
Sign Up
Kata
Kumite
Forum
Wiki
Leaders
Log In
Sign Up
Library
Collections
Sort by:
Newest
Oldest
Popularity
Positive Feedback
Most Completed
Least Completed
Recently Published
Hardest
Easiest
Name
Language:
All
My Languages
Agda (Beta)
BF (Beta)
C
Clojure
CoffeeScript
Coq (Beta)
C++
Crystal
C#
Dart
Elixir
Elm (Beta)
Erlang (Beta)
Factor (Beta)
Forth (Beta)
Fortran (Beta)
F#
Go
Groovy (Beta)
Haskell
Idris (Beta)
Java
JavaScript
Julia (Beta)
Kotlin (Beta)
Lua (Beta)
NASM (Beta)
Nim (Beta)
Objective-C (Beta)
OCaml (Beta)
PHP
PowerShell (Beta)
PureScript (Beta)
Python
R (Beta)
Racket (Beta)
Reason (Beta)
Ruby
Rust
Scala (Beta)
Shell
Solidity (Beta)
SQL
Swift
TypeScript
VB (Beta)
Status:
Approved & Beta
Approved
Beta
Progress:
All
Kata I have not trained on
Kata I have not completed
Kata I have completed
Difficulty:
8 kyu
8 kyu
7 kyu
7 kyu
6 kyu
6 kyu
5 kyu
5 kyu
4 kyu
4 kyu
3 kyu
3 kyu
2 kyu
2 kyu
1 kyu
1 kyu
Tags:
Fundamentals (4001)
Algorithms (2953)
Data Types (2424)
Logic (2145)
Numbers (1272)
Strings (1167)
Puzzles (1157)
Arrays (1011)
Games (977)
Mathematics (968)
Basic Language Features (838)
Programming Paradigms (791)
Data Structures (567)
Control Flow (551)
Declarative Programming (488)
Advanced Language Features (345)
Regular Expressions (263)
Object-oriented Programming (242)
Functions (210)
Lists (208)
Functional Programming (173)
Arithmetic (170)
Loops (167)
Objects (141)
Bugs (131)
Data (126)
Algebra (125)
Theoretical Computer Science (114)
Security (111)
Performance (109)
Sorting (105)
Parsing (103)
Computability Theory (100)
Recursion (100)
Binary (95)
Classes (95)
Integers (93)
Optimization (91)
Utilities (86)
Cryptography (85)
Geometry (85)
Databases (83)
Information Systems (83)
SQL (81)
Graphs (79)
Dates/Time (73)
Sequences (64)
Design Principles (61)
Design Patterns (59)
Formatting (51)
1801 Kata Found
7 kyu
Ironman Triathlon
10
10
0
84%
of
50
196
A.Partridge
1 Issue Reported
Fundamentals
Numbers
Arrays
Objects
7 kyu
Ski Jump
4
4
1
81%
of
59
210
A.Partridge
Fundamentals
Strings
Arrays
Mathematics
Algorithms
Numbers
8 kyu
Sum Mixed Array
89
89
42
91%
of
1,432
10,538
A.Partridge
Fundamentals
Strings
Numbers
Arrays
7 kyu
Holiday II - Plane Seating
9
9
2
89%
of
71
268
A.Partridge
Fundamentals
Strings
Numbers
Arrays
8 kyu
Count the Monkeys!
182
182
67
89%
of
2,293
20,195
A.Partridge
1 Issue Reported
Algorithms
Arrays
Fundamentals
Ranges
Basic Language Features
Lists
Data Structures
8 kyu
The 'if' function
114
114
29
70%
of
829
8,642
user578387
3 Issues Reported
Fundamentals
Functional Programming
Declarative Programming
Higher-order Functions
Functions
Control Flow
Basic Language Features
6 kyu
Pairs of Bears
8
8
4
91%
of
66
229
A.Partridge
Fundamentals
Strings
Numbers
Arrays
7 kyu
Double Sort
11
11
8
90%
of
237
1,007
A.Partridge
Fundamentals
Strings
Numbers
Arrays
6 kyu
Lattice Point Interpolation
5
5
3
90%
of
5
8
abiessu
Algorithms
Numbers
Integers
Arrays
6 kyu
Amidakuji
34
34
9
94%
of
73
261
docgunthrop
Fundamentals
Arrays
6 kyu
Vowels Back
28
28
4
84%
of
97
356
A.Partridge
1 Issue Reported
Algorithms
Fundamentals
Strings
Arrays
Loops
Control Flow
Basic Language Features
7 kyu
Sum of odd numbers
947
947
164
84%
of
5,252
37,635
hhelwich
Fundamentals
Arrays
Lists
Data Structures
Numbers
Arithmetic
Mathematics
Algorithms
6 kyu
Sort Arrays (Ignoring Case)
29
29
3
83%
of
230
3,890
ineiti
1 Issue Reported
Fundamentals
Arrays
Sorting
Algorithms
4 kyu
Sum of Intervals
474
474
101
91%
of
992
7,085
xDranik
2 Issues Reported
Algorithms
Aggregations
Arithmetic
Mathematics
Numbers
Integers
3 kyu
Alphametics Solver
115
115
25
94%
of
25
97
docgunthrop
Algorithms
Puzzles
Games
Performance
Optimization
Cryptography
Security
6 kyu
Who has the most money?
57
57
12
89%
of
193
1,567
MrAppa
Algorithms
Object-oriented Programming
7 kyu
The wheat/rice and chessboard problem
48
48
10
92%
of
258
1,162
GiacomoSorbi
Puzzles
Mathematics
Algorithms
Numbers
Bitwise Operators
Bits
Operators
Advanced Language Features
Binary
Fundamentals
Recursion
Computability Theory
Theoretical Computer Science
6 kyu
Vowel-consonant lexicon
19
19
5
92%
of
89
267
KenKamau
Algorithms
Strings
Arrays
5 kyu
Josephus Survivor
374
374
80
90%
of
609
4,357
GiacomoSorbi
Algorithms
Mathematics
Numbers
Lists
Data Structures
Arrays
8 kyu
Sum of differences in array
57
57
22
87%
of
498
3,056
kamilalew
Fundamentals
Arrays
4 kyu
Square into Squares. Protect trees!
1122
1122
173
92%
of
743
4,260
g964
Fundamentals
Mathematics
Algorithms
Numbers
Sequences
Arrays
6 kyu
The Supermarket Queue
1611
1611
346
93%
of
2,540
14,056
mattlub
Fundamentals
Arrays
Loops
Control Flow
Basic Language Features
5 kyu
Ziggurat Ride of Fortune
33
33
8
100%
of
26
70
docgunthrop
Algorithms
Arrays
Performance
6 kyu
PI approximation
144
144
27
81%
of
503
2,816
g964
Fundamentals
Arrays
Mathematics
Algorithms
Numbers
6 kyu
Tetris Series #2 — Primitive Gameplay
8
8
1
95%
of
19
46
Etoneja
Fundamentals
Games
Algorithms
Basic Language Features
Loops
Control Flow
Arrays
6 kyu
Numerical Palindrome #3.5
8
8
1
94%
of
62
163
kkavita92
Fundamentals
Arrays
6 kyu
Build a pile of Cubes
1203
1203
146
85%
of
4,697
32,685
g964
1 Issue Reported
Fundamentals
Optimization
6 kyu
Create Phone Number
604
604
183
82%
of
6,048
54,983
xDranik
Algorithms
Arrays
Strings
Loops
Control Flow
Basic Language Features
Fundamentals
Formatting
Regular Expressions
Declarative Programming
Advanced Language Features
5 kyu
Master your primes: sieve with memoization
26
26
12
82%
of
25
68
GiacomoSorbi
Algorithms
Memoization
Design Patterns
Design Principles
Optimization
8 kyu
Yield to the Block
28
28
3
89%
of
94
2,450
agram
1 Issue Reported
Fundamentals
Blocks
Object-oriented Programming
Functions
Control Flow
Basic Language Features
Functional Programming
Declarative Programming
Higher-order Functions
Loading...
Confirm