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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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3 kyu
Make a spiral
14,641Bugari
Algorithms
Arrays
Logic
3 kyu
Divide integers as strings
994Voile
Strings
Fundamentals
Big Integers
Algorithms
3 kyu
Divide numbers as strings
198osofem
Mathematics
Big Integers
Fundamentals
Retired
Did I Finish my Sudoku? (retired)
15,659suuuzi
Mathematics
Puzzles
Games
Game Solvers
5 kyu
Tic-Tac-Toe (3D)
350dinglemouse
Fundamentals
4 kyu
Ten-Pin Bowling
3,492dnolan
Algorithms
Puzzles
4 kyu
Validate Sudoku with size `NxN`
9,352cbmono
Arrays
Puzzles
Algorithms
Object-oriented Programming
6 kyu
Smart Sum
1,458nathan-lapinski
Arrays
Recursion
Fundamentals
5 kyu
String tree-ification
139joh_pot
Data Structures
Recursion
Fundamentals
5 kyu
Fun with trees: is perfect
1,501janitormeir
Trees
Recursion
Binary Trees
Binary Search Trees
Data Structures
Algorithms
6 kyu
Fun with trees: max sum
4,275janitormeir
Trees
Recursion
Binary Trees
Binary Search Trees
Data Structures
Algorithms
5 kyu
Binary Tree Traversal
2,024Ban-Ath
Binary Trees
Trees
Recursion
Data Structures
Algorithms