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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
RGB To Hex Conversion
132,480jhoffner
Algorithms
4 kyu
Twice linear
22,784g964
Mathematics
Algorithms
6 kyu
Playing with digits
137,650g964
Fundamentals
Mathematics
4 kyu
Roman Numerals Helper
29,787jhoffner
Algorithms
Object-oriented Programming
5 kyu
Is my friend cheating?
17,537g964
Fundamentals
Mathematics
Puzzles
4 kyu
Hamming Numbers
11,582xcthulhu
Number Theory
Algorithms
4 kyu
Codewars style ranking system
16,949jhoffner
Algorithms
Object-oriented Programming
4 kyu
Functional streams
739muesli4
Streams
Functional Programming
Algorithms
4 kyu
The Greatest Warrior
3,463BurstNova
Algorithms
Object-oriented Programming
5 kyu
Rot13
91,487Rubikan
Ciphers
Fundamentals
5 kyu
Moving Zeros To The End
179,064xcthulhu
Arrays
Sorting
Algorithms
4 kyu
Find the unknown digit
8,111JJ-Bug
Mathematics
Algorithms
Puzzles
5 kyu
Calculating with Functions
81,830BattleRattle
Functional Programming
4 kyu
parseInt() reloaded
17,530BattleRattle
Parsing
Strings
Algorithms
5 kyu
Simple Events
5,741akoptsov
Design Patterns
Event Handling
Fundamentals
1 kyu
Functional SQL
2,730surtich
Functional Programming
Algorithms
4 kyu
Sum Strings as Numbers
43,277nicknovitski
Strings
Big Integers
Algorithms
5 kyu
Pick peaks
28,314frenetic_be
Arrays
Algorithms
4 kyu
Sum of Intervals
38,388xDranik
Algorithms
Performance
4 kyu
Determining if a graph has a solution
1,487damned3
Algorithms
Data Structures
Graph Theory
Retired
Calculator (retired)
11,547obrok
Algorithms
Parsing
Logic
Strings
Expressions
Basic Language Features
Fundamentals
5 kyu
Josephus Survivor
15,930GiacomoSorbi
Mathematics
Combinatorics
Algorithms
Lists
Arrays
5 kyu
Count IP Addresses
28,270xDranik
Algorithms
5 kyu
Write out numbers
3,398frenetic_be
Fundamentals
5 kyu
Molecule to atoms
5,886romanzes
Parsing
Algorithms
Strings
5 kyu
Josephus Permutation
15,549GiacomoSorbi
Mathematics
Permutations
Algorithms
Combinatorics
4 kyu
Born to be chained
1,179surtich
Functional Programming
3 kyu
The Lift
3,318dinglemouse
Algorithms
Queues
Data Structures
6 kyu
Backspaces in string
18,444vetalpaprotsky
Fundamentals
Strings
Algorithms
5 kyu
Sweeping trees
76hyperion
Trees
Algorithms
Graph Theory
3 kyu
Alphametics Solver
418docgunthrop
Puzzles
Performance
Cryptography
Algorithms
4 kyu
So Many Permutations!
47,283BattleRattle
Permutations
Strings
Algorithms
6 kyu
Spiral Column Addition
68phildinius
Mathematics
Algorithms
Puzzles
5 kyu
Decorator Pattern
398surtich
Design Patterns
Decorator
Object-oriented Programming
Fundamentals
4 kyu
ES5 Generators(i)
1,134surtich
Functional Programming
Fundamentals
6 kyu
Hexagon Beam Max Sum
313docgunthrop
Puzzles
Arrays
Algorithms
4 kyu
Strings Mix
23,093g964
Fundamentals
Strings
4 kyu
Breadcrumb Generator
4,567GiacomoSorbi
Parsing
Regular Expressions
Algorithms
6 kyu
Meeting
20,455g964
Fundamentals
6 kyu
Crack the PIN
2,924zLuki
Algorithms
Cryptography
4 kyu
Adding Big Numbers
32,108Becojo
Mathematics
Big Integers
Algorithms
4 kyu
Strip Comments
52,333jhoffner
Strings
Algorithms
5 kyu
Gap in Primes
21,019g964
Fundamentals
4 kyu
Can you really count divisors?
482kabaczek83
Algorithms
Mathematics
4 kyu
Sum by Factors
19,125g964
Arrays
Algorithms
Mathematics
4 kyu
Large Factorials
9,135matt c
Algorithms
Big Integers
3 kyu
Binomial Expansion
6,113TheDoctor
Mathematics
Algebra
Algorithms
6 kyu
Which are in?
79,572g964
Arrays
Lists
Strings
Refactoring
5 kyu
Play with two Strings
3,500smile67
Fundamentals
Strings
Algorithms
5 kyu
Integers: Recreation One
26,105g964
Fundamentals
Algorithms
5 kyu
Simple Finite State Machine Compiler
756awesomeaf
State Machines
Interpreters
Compilers
4 kyu
Counter: Pythonize your Java!! (VERBOSE)
79Blind4Basics
Object-oriented Programming
Fundamentals