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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
Sum The Tree
4,667jz9000
Trees
Recursion
Binary Trees
Binary Search Trees
Data Structures
Fundamentals
4 kyu
Sort binary tree by levels
12,966kars7e
Trees
Binary Trees
Performance
Algorithms
Sorting
6 kyu
Binary Tree Compare
1,792bovard
Binary Trees
Algorithms
6 kyu
Bit Counting
238,119xcthulhu
Bits
Algorithms
6 kyu
Tribonacci Sequence
151,623GiacomoSorbi
Number Theory
Arrays
Lists
Fundamentals
6 kyu
Break camelCase
116,147hakt
Strings
Fundamentals
5 kyu
Scramblies
54,107joh_pot
Strings
Performance
Algorithms
4 kyu
Sum of Intervals
37,738xDranik
Algorithms
Performance
4 kyu
Sum Strings as Numbers
42,561nicknovitski
Strings
Big Integers
Algorithms
5 kyu
Rot13
90,145Rubikan
Ciphers
Fundamentals
5 kyu
Josephus Survivor
15,769GiacomoSorbi
Mathematics
Combinatorics
Algorithms
Lists
Arrays
6 kyu
Detect Pangram
178,485anindyabd
Strings
Data Structures
Fundamentals
6 kyu
Linked Lists - Length & Count
9,779JDeBolt
Linked Lists
Data Structures
Fundamentals