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Start training on this collection. Each time you skip or complete a kata you will be taken to the next kata in the series. Once you cycle through the items in the collection you will revert back to your normal training routine.

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5 kyu
Moving Zeros To The End
178,792xcthulhu
Arrays
Sorting
Algorithms
6 kyu
Number , number ... wait LETTER !
1,572user3879542
Strings
Mathematics
Fundamentals
6 kyu
Sierpinski triangle
90user7657844
Algorithms
ASCII Art
6 kyu
Hollow Triangle
336user3879542
ASCII Art
Fundamentals
5 kyu
Getting along with Bernoulli's numbers
198g964
Fundamentals
Mathematics
6 kyu
Write Number in Expanded Form
79,896Belax8
Strings
Mathematics
Algorithms
Fundamentals
5 kyu
Write out numbers
3,397frenetic_be
Fundamentals
6 kyu
Write Number in Expanded Form - Part 2
1,980Belax8
Mathematics
Algorithms
Fundamentals
5 kyu
Pick peaks
28,300frenetic_be
Arrays
Algorithms
5 kyu
Solve For X
166Belax8
Algorithms
Puzzles
Mathematics
Fundamentals
6 kyu
Array.diff
283,384marcinbunsch
Arrays
Fundamentals
Algorithms
6 kyu
Is a number prime?
111,891arithmetric
Mathematics
Algorithms
6 kyu
Unique In Order
183,820pinelopi
Algorithms
Fundamentals
6 kyu
Two Sum
81,428wthit56
Arrays
Fundamentals
Algorithms
4 kyu
Human readable duration format
82,253davazp
Strings
Date Time
Algorithms
4 kyu
Strip Comments
52,283jhoffner
Strings
Algorithms
4 kyu
So Many Permutations!
47,234BattleRattle
Permutations
Strings
Algorithms
Retired
Calculator (retired)
11,547obrok
Algorithms
Parsing
Logic
Strings
Expressions
Basic Language Features
Fundamentals
3 kyu
Make a spiral
14,573Bugari
Algorithms
Arrays
Logic
3 kyu
Alphabetic Anagrams
6,189Azuaron
Mathematics
Logic
Strings
Algorithms
3 kyu
Papers, Please
773docgunthrop
Object-oriented Programming
Games
Regular Expressions
Fundamentals
2 kyu
Evaluate mathematical expression
9,487ankr
Mathematics
Parsing
Algorithms
2 kyu
Parsing and evaluation of mathematical expressions
172smile67
Algorithms
Data Structures
Parsing
Interpreters
Mathematics
2 kyu
6 By 6 Skyscrapers
2,442FrankK
Mathematics
Puzzles
Games
Arrays
Matrix
Algorithms
1 kyu
BECOME IMMORTAL
3,046Voile
Puzzles
Dynamic Programming
Performance
Algorithms
1 kyu
Mine Sweeper
1,244myjinxin2015
Puzzles
Game Solvers
1 kyu
Sliding Puzzle Solver
1,067docgunthrop
Puzzles
Genetic Algorithms
Game Solvers
Algorithms
1 kyu
Loopover
307jaybruce1998
Puzzles
Algorithms
Game Solvers
5 kyu
Convert A Hex String To RGB
14,933Krxtopher
Parsing
Strings
Algorithms
6 kyu
Ranking System
1,048tostaylo
Fundamentals
4 kyu
Codewars style ranking system
16,933jhoffner
Algorithms
Object-oriented Programming
6 kyu
Codewars Leaderboard
426jamad
Fundamentals
Retired
Fast Stats on an Array (retired)
111constablebrew
Status:Retired
Estimated Rank:
2 kyu
Fundamentals
Properties
Basic Language Features
Object-oriented Programming
Programming Paradigms
Inheritance
Polymorphism
Scopes
3 kyu
Do not loose at tic-tac-toe!
196user5036852
Fundamentals
Arrays
Logic
Mathematics
Algorithms
3 kyu
Create a simple Class at Runtime
242EatYourBeetS
Reflection
Metaprogramming
Fundamentals
2 kyu
Whitespace Interpreter
1,104jacobb
Esoteric Languages
Interpreters
Algorithms
6 kyu
Find the Mine!
6,030xDranik
Arrays
Algorithms
5 kyu
Square Matrix Multiplication
7,233xDranik
Matrix
Linear Algebra
Algorithms
5 kyu
Rotate a square matrix like a vortex
562user5036852
Logic
Arrays
Algorithms
Matrix
1 kyu
Four Pass Transport
234docgunthrop
Puzzles
Games
Logic
Algorithms
5 kyu
Second Variation on Caesar Cipher
1,960g964
Fundamentals
Ciphers
Cryptography
4 kyu
Undirected weighted graph
201g964
Fundamentals
Lists
Matrix
Graph Theory
5 kyu
First Variation on Caesar Cipher
4,837g964
Fundamentals
Ciphers
Strings
Beta
Derpcode Interpreter
52beniolenio
Status:Waiting for issues to be resolved
Estimated Rank:
6 kyu
Esoteric Languages
Interpreters
Algorithms
Beta
Escape the hidden Mines!
10mklnwt
Status:Testing & feedback needed
Estimated Rank:
3 kyu
Games
Puzzles
Algorithms
Fundamentals
Logic
4 kyu
Escape the maze
813cyril-lemaire
Fundamentals
Algorithms
6 kyu
Take a picture !
582nogainbar
Regular Expressions
Fundamentals
Retired
Decreasing Numbers with N Digits (retired)
31datagram
Status:Retired
Estimated Rank:
5 kyu
Mathematics
Fundamentals
6 kyu
Highest Perfect Square with Same Digits
238raulbc777
Fundamentals
Data Structures
Algorithms
Mathematics
Performance
Permutations
6 kyu
Base Conversion
10,718BattleRattle
Strings
Mathematics
Algorithms
5 kyu
Primes in the Last Digits of Huge Numbers
125raulbc777
Fundamentals
Mathematics
Algorithms
Data Structures
3 kyu
Metaclasses - Simple Django Models
268horejsek
Object-oriented Programming
Metaprogramming
Backend
4 kyu
Simple maze
965eugene-katsevman
Queues
Recursion
Algorithms