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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
1,500Voile
Restricted
Puzzles
8 kyu
Never visit a . . . !?
19,304aryan-firouzian
Puzzles
Strings
Number Theory
Mathematics
6 kyu
The latest clock
2,487nirgn
Date Time
Fundamentals
Algorithms
5 kyu
Human Readable Time
140,055BattleRattle
Date Time
Mathematics
Algorithms
5 kyu
RGB To Hex Conversion
129,768jhoffner
Algorithms
4 kyu
Sum of Intervals
37,730xDranik
Algorithms
Performance
4 kyu
Sum by Factors
18,887g964
Arrays
Algorithms
Mathematics
4 kyu
Strings Mix
22,833g964
Fundamentals
Strings
4 kyu
Twice linear
22,472g964
Mathematics
Algorithms
4 kyu
Roman Numerals Helper
29,148jhoffner
Algorithms
Object-oriented Programming
6 kyu
Remove a Specific Element of an Array
767raulbc777
Fundamentals
Data Structures
Algorithms
Mathematics
Logic
5 kyu
Advanced Pig Latin
962davidbrear
Regular Expressions
Fundamentals
6 kyu
Simple Simple Simple String Expansion
3,417alansun
Strings
Regular Expressions
Fundamentals
6 kyu
Single Word Pig Latin
1,951MicheDev
Strings
Games
Regular Expressions
5 kyu
Greed is Good
55,270JulianNicholls
Algorithms
5 kyu
Square Matrix Multiplication
7,158xDranik
Matrix
Linear Algebra
Algorithms
5 kyu
Josephus Permutation
15,359GiacomoSorbi
Mathematics
Permutations
Algorithms
Combinatorics
5 kyu
Josephus Survivor
15,766GiacomoSorbi
Mathematics
Combinatorics
Algorithms
Lists
Arrays
6 kyu
Array.diff
278,904marcinbunsch
Arrays
Fundamentals
Algorithms
6 kyu
Bit Counting
238,045xcthulhu
Bits
Algorithms
6 kyu
I love big nums and I cannot lie
744joh_pot
Strings
Arrays
Algorithms
6 kyu
Selective Array Reversing
2,113kodejuice
Algorithms
Logic
Arrays
6 kyu
Count the smiley faces!
94,575St3f4n
Regular Expressions
Fundamentals
6 kyu
Mix Fruit Juice
1,080Heathercoraje
Fundamentals
Arrays
6 kyu
The Supermarket Queue
50,478mattlub
Arrays
Fundamentals
6 kyu
Parse HTML/CSS Colors
2,674junthecoder
Fundamentals
Algorithms
Strings
Parsing
4 kyu
Adding Big Numbers
31,543Becojo
Mathematics
Big Integers
Algorithms
4 kyu
Pyramid Slide Down
17,732rodentrabies
Algorithms
Dynamic Programming
4 kyu
Polygroup Mania
22dfhwze
Algorithms
Arrays
Recursion
Performance
4 kyu
Gymbro's Unique Gym - Weight Calculator
32Zanamo
Algorithms
Performance
Combinatorics
4 kyu
Bridge the Islands
58hexolio
Graph Theory
Performance
4 kyu
parseInt() reloaded
17,207BattleRattle
Parsing
Strings
Algorithms
3 kyu
Sudoku Solver
13,668pineappleclock
Games
Game Solvers
Algorithms
3 kyu
Make a spiral
14,378Bugari
Algorithms
Arrays
Logic
3 kyu
Rail Fence Cipher: Encoding and Decoding
8,411darrentburgess
Algorithms
Ciphers
Cryptography
Strings
Security
3 kyu
Alphabetic Anagrams
6,096Azuaron
Mathematics
Logic
Strings
Algorithms
3 kyu
Binomial Expansion
5,999TheDoctor
Mathematics
Algebra
Algorithms
3 kyu
The Lift
3,270dinglemouse
Algorithms
Queues
Data Structures
3 kyu
Defuse the bombs!
2,699Zyklus
Strings
Puzzles
Security
3 kyu
GET TO THE CHOPPA!
1,080sazlin
Games
Puzzles
Algorithms
Graph Theory
3 kyu
One Line Task: Check Range
1,506myjinxin2015
Puzzles
Restricted
3 kyu
Fabergé Easter Eggs crush test
1,771Ivana
Mathematics
Dynamic Programming
Performance
Algorithms
2 kyu
Evaluate mathematical expression
9,363ankr
Mathematics
Parsing
Algorithms
6 kyu
Duplicate Encoder
216,942obnounce
Strings
Arrays
Fundamentals