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Train Now

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.

Description

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1 kyu
Multi Line Task∞: Hello World
1,512Voile
Restricted
Puzzles
8 kyu
Never visit a . . . !?
19,974aryan-firouzian
Puzzles
Strings
Number Theory
Mathematics
6 kyu
The latest clock
2,657nirgn
Date Time
Fundamentals
Algorithms
5 kyu
Human Readable Time
142,695BattleRattle
Date Time
Mathematics
Algorithms
5 kyu
RGB To Hex Conversion
132,609jhoffner
Algorithms
4 kyu
Sum of Intervals
38,420xDranik
Algorithms
Performance
4 kyu
Sum by Factors
19,140g964
Arrays
Algorithms
Mathematics
4 kyu
Strings Mix
23,111g964
Fundamentals
Strings
4 kyu
Twice linear
22,799g964
Mathematics
Algorithms
4 kyu
Roman Numerals Helper
29,817jhoffner
Algorithms
Object-oriented Programming
6 kyu
Remove a Specific Element of an Array
777raulbc777
Fundamentals
Data Structures
Algorithms
Mathematics
Logic
5 kyu
Advanced Pig Latin
967davidbrear
Regular Expressions
Fundamentals
6 kyu
Simple Simple Simple String Expansion
3,479alansun
Strings
Regular Expressions
Fundamentals
6 kyu
Single Word Pig Latin
1,968MicheDev
Strings
Games
Regular Expressions
5 kyu
Greed is Good
56,708JulianNicholls
Algorithms
5 kyu
Square Matrix Multiplication
7,238xDranik
Matrix
Linear Algebra
Algorithms
5 kyu
Josephus Permutation
15,557GiacomoSorbi
Mathematics
Permutations
Algorithms
Combinatorics
5 kyu
Josephus Survivor
15,936GiacomoSorbi
Mathematics
Combinatorics
Algorithms
Lists
Arrays
6 kyu
Array.diff
283,946marcinbunsch
Arrays
Fundamentals
Algorithms
6 kyu
Bit Counting
242,003xcthulhu
Bits
Algorithms
6 kyu
I love big nums and I cannot lie
747joh_pot
Strings
Arrays
Algorithms
6 kyu
Selective Array Reversing
2,135kodejuice
Algorithms
Logic
Arrays
6 kyu
Count the smiley faces!
96,318St3f4n
Regular Expressions
Fundamentals
6 kyu
Mix Fruit Juice
1,087Heathercoraje
Fundamentals
Arrays
6 kyu
The Supermarket Queue
51,372mattlub
Arrays
Fundamentals
6 kyu
Parse HTML/CSS Colors
2,703junthecoder
Fundamentals
Algorithms
Strings
Parsing
4 kyu
Adding Big Numbers
32,129Becojo
Mathematics
Big Integers
Algorithms
4 kyu
Pyramid Slide Down
18,024rodentrabies
Algorithms
Dynamic Programming
4 kyu
Polygroup Mania
24dfhwze
Algorithms
Arrays
Recursion
Performance
4 kyu
Gymbro's Unique Gym - Weight Calculator
32Zanamo
Algorithms
Performance
Combinatorics
4 kyu
Bridge the Islands
65hexolio
Graph Theory
Performance
4 kyu
parseInt() reloaded
17,546BattleRattle
Parsing
Strings
Algorithms
3 kyu
Sudoku Solver
14,018pineappleclock
Games
Game Solvers
Algorithms
3 kyu
Make a spiral
14,592Bugari
Algorithms
Arrays
Logic
3 kyu
Rail Fence Cipher: Encoding and Decoding
8,555darrentburgess
Algorithms
Ciphers
Cryptography
Strings
Security
3 kyu
Alphabetic Anagrams
6,205Azuaron
Mathematics
Logic
Strings
Algorithms
3 kyu
Binomial Expansion
6,121TheDoctor
Mathematics
Algebra
Algorithms
3 kyu
The Lift
3,321dinglemouse
Algorithms
Queues
Data Structures
3 kyu
Defuse the bombs!
2,717Zyklus
Strings
Puzzles
Security
3 kyu
GET TO THE CHOPPA!
1,110sazlin
Games
Puzzles
Algorithms
Graph Theory
3 kyu
One Line Task: Check Range
1,530myjinxin2015
Puzzles
Restricted
3 kyu
Fabergé Easter Eggs crush test
1,792Ivana
Mathematics
Dynamic Programming
Performance
Algorithms
2 kyu
Evaluate mathematical expression
9,498ankr
Mathematics
Parsing
Algorithms
6 kyu
Duplicate Encoder
220,752obnounce
Strings
Arrays
Fundamentals