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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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6 kyu
Logistic Map
404GiacomoSorbi
Graph Theory
Matrix
Arrays
Lists
Algorithms
6 kyu
Triangle type
8,673SagePtr
Geometry
Mathematics
Algorithms
6 kyu
Sort the odd
108,264fyvfyv
Fundamentals
Arrays
Sorting
Draft
2 numbers, 1 solution
434Oliver.Hynds
Status:Draft
Estimated Rank:
7 kyu
Fundamentals
Algorithms
Draft
Sum of a Geometric Sequence
36UppyMeister
Status:Draft
Estimated Rank:
7 kyu
Mathematics
6 kyu
Kontti Language
252sofiapoh
Regular Expressions
Fundamentals
Retired
Decreasing Numbers with N Digits (retired)
31datagram
Status:Retired
Estimated Rank:
5 kyu
Mathematics
Fundamentals
6 kyu
Count the smiley faces!
96,631St3f4n
Regular Expressions
Fundamentals
6 kyu
Counting Duplicates
230,864kgashok
Strings
Fundamentals
6 kyu
Array Helpers
23,017BattleRattle
Arrays
Fundamentals
Object-oriented Programming
6 kyu
Street Fighter 2 - Character Selection
11,774mmalkavian
Arrays
Lists
Fundamentals
Graph Theory
7 kyu
Monotone travel
6,625bkaes
Lists
Fundamentals
6 kyu
Build Tower
101,0508fdafs2
Strings
ASCII Art
Fundamentals
6 kyu
Title Case
37,384user527539
Strings
Fundamentals
6 kyu
Unique In Order
184,634pinelopi
Algorithms
Fundamentals
Retired
Format a string of names like 'Bart, Lisa & Maggie'. (retired)
71,234weavermedia
Fundamentals
Strings
Data Types
Formatting
Algorithms
Logic
7 kyu
Kooka-Counter
3,426dinglemouse
Strings
Algorithms
4 kyu
Explosive Sum
8,572surtich
Algorithms
Mathematics
Fundamentals
6 kyu
Playing with digits
138,147g964
Fundamentals
Mathematics
5 kyu
Sort - one, three, two
2,187dinglemouse
Sorting
Strings
Algorithms
5 kyu
Calculating with Functions
82,140BattleRattle
Functional Programming
5 kyu
Moving Zeros To The End
179,905xcthulhu
Arrays
Sorting
Algorithms
5 kyu
String incrementer
48,817parceval
Regular Expressions
Strings
7 kyu
Two to One
169,895g964
Fundamentals
6 kyu
Design a Simple Automaton (Finite State Machine)
6,025Ban-Ath
State Machines
Artificial Intelligence
Algorithms
Object-oriented Programming
5 kyu
Brian's Brain
84St3f4n
Algorithms
5 kyu
Langton's ant
444St3f4n
Recursion
Algorithms
3 kyu
Make a spiral
14,639Bugari
Algorithms
Arrays
Logic
6 kyu
Base Conversion
10,721BattleRattle
Strings
Mathematics
Algorithms
8 kyu
validate code with simple regex
13,705daymos
Regular Expressions
Fundamentals
4 kyu
Multiplying numbers as strings
9,949osofem
Strings
Big Integers
Algorithms
3 kyu
Divide integers as strings
994Voile
Strings
Fundamentals
Big Integers
Algorithms
8 kyu
Pole Vault Starting Marks
4,091HerrWert
Fundamentals
Mathematics
Puzzles
3 kyu
Sudoku Solver
14,128pineappleclock
Games
Game Solvers
Algorithms
4 kyu
Hamming Numbers
11,648xcthulhu
Number Theory
Algorithms
Beta
Scrambled Numbers Sorting
17CamWalker
Status:Testing & feedback needed
Estimated Rank:
5 kyu
Strings
Arrays
Algorithms
Puzzles
Sorting
6 kyu
Matrices I: A form of data storage
156MazTheMazy
Fundamentals
Mathematics
Data Structures
Algebra
Linear Algebra
Arrays
Lists
Matrix
5 kyu
Write out numbers
3,407frenetic_be
Fundamentals
4 kyu
Default Arguments
1,325xcthulhu
Functional Programming
Metaprogramming
4 kyu
Dependency Injection
4,227kesheshyan
Regular Expressions
Design Patterns
Object-oriented Programming
Angular
5 kyu
Molecule to atoms
5,893romanzes
Parsing
Algorithms
Strings
Beta
LU Decomposition
21Thom
Status:Waiting for issues to be resolved
Estimated Rank:
4 kyu
Algorithms
Linear Algebra
Mathematics
Matrix
Retired
Lottery (retired)
33urbanendeavour
Status:Retired
Fundamentals
Arrays
Data Types
Mathematics
Algorithms
Logic
Numbers
4 kyu
Matrix Determinant
23,002pjfranzini
Matrix
Linear Algebra
Mathematics
Recursion
Algorithms
5 kyu
Monads: The list monad
305surtich
Functional Programming
Arrays
Fundamentals
Retired
Recursion #1 - Factorial (retired)
8,336gabrielsiedler
Fundamentals
Recursion
Mathematics
4 kyu
Born to be chained
1,180surtich
Functional Programming
5 kyu
How deep do these trees even go?
62Voile
Fundamentals
Data Structures
Trees
5 kyu
Morse Encoding
1,230constablebrew
Bits
Strings
Binary
Parsing
Algorithms
3 kyu
GET TO THE CHOPPA!
1,116sazlin
Games
Puzzles
Algorithms
Graph Theory
6 kyu
Unary function chainer
6,999tpatja
Functional Programming
Fundamentals
Draft
No Love
310tabrza
Status:Draft
Estimated Rank:
7 kyu
6 kyu
I am very very very....
283ben8p
Fundamentals
Strings
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
5 kyu
Image Processing
740constablebrew
Image Processing
Matrix
Algorithms
6 kyu
Rectangle into Squares
32,560g964
Fundamentals
Geometry
Puzzles