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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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Ad
6 kyu
FIXME: Hello
1,992dinglemouse
Debugging
6 kyu
Address Book by State
1,262g964
Fundamentals
Strings
6 kyu
Card Games: Black Jack
261EricRamirezS
Games
Fundamentals
Algorithms
7 kyu
Laxative Shot Roulette
1,303tl123
Probability
Puzzles
Data Science
Statistics
4 kyu
Ranking Poker Hands
3,035FrankK
Games
Algorithms
Object-oriented Programming
8 kyu
What's up next?
5,728ExaStencil
Fundamentals
Data Structures
Logic
6 kyu
Simple Encryption #1 - Alternating Split
27,482user5036852
Cryptography
Algorithms
Strings
Arrays
Fundamentals
5 kyu
NSA Phone Tapping
320dnolan
Fundamentals
Object-oriented Programming
6 kyu
+1 Array
11,018khelmar
Fundamentals
Arrays
Algorithms
6 kyu
Merge in 2048
737mrfox
Games
Arrays
Algorithms
5 kyu
Ant Bridge
523dinglemouse
Algorithms
6 kyu
Matrix Addition
13,086xDranik
Matrix
Arrays
Algorithms
4 kyu
Human readable duration format
77,969davazp
Strings
Date Time
Algorithms
4 kyu
Strip Comments
50,200jhoffner
Strings
Algorithms
5 kyu
ISBN-10 Validation
9,666nklein
Regular Expressions
Algorithms
6 kyu
The Deaf Rats of Hamelin
6,236dinglemouse
Fundamentals
Strings
Algorithms
Queues
Data Structures
6 kyu
Rotation Cipher Cracker
815NicholasSeward
Ciphers
Cryptography
Algorithms
Security
Puzzles
7 kyu
nth Floyd line
1,021kodejuice
Mathematics
Puzzles
Fundamentals
5 kyu
Bananas
965dinglemouse
Strings
Algorithms
6 kyu
String array duplicates
7,451KenKamau
Strings
Arrays
Algorithms
6 kyu
Hollow array
700aweleshetu
Arrays
Fundamentals
5 kyu
A Brave New Wordle
289photo-pizza-importance
Algorithms
Strings
Puzzles
7 kyu
Digital cypher vol 2
2,922dcieslak
Fundamentals
Ciphers
Cryptography
6 kyu
Ping Pong
577dinglemouse
Algorithms
6 kyu
Group in 10s
967matthewglover
Arrays
Lists
Fundamentals
6 kyu
80's Kids #7: She's a Small Wonder
1,927NateBrady23
Fundamentals
Object-oriented Programming
7 kyu
Smoking Timmy
882phju
Algorithms
Fundamentals
7 kyu
Reduce My Fraction
3,469SavageWilliam
Fundamentals
Recursion
Algorithms
6 kyu
Who won the election?
3,432SithFire
Algorithms
Lists
Fundamentals
6 kyu
Add All
917sazzadshopno
Fundamentals
Mathematics
6 kyu
Versions manager
1,559bedis-elacheche
Algorithms
Arrays
Strings
Object-oriented Programming
6 kyu
Separate The Wheat From The Chaff
1,692MrZizoScream
Fundamentals
Arrays
Performance
6 kyu
Financing a purchase
890g964
Fundamentals
Mathematics
7 kyu
Alphabetical Grid
1,542Djacon
Fundamentals
Algorithms
7 kyu
Minimum Perimeter of a Rectangle
1,170Kinto
Fundamentals
Algorithms
6 kyu
Positions Average
3,614g964
Fundamentals
Strings
6 kyu
Is a number prime?
107,044arithmetric
Mathematics
Algorithms
6 kyu
Where is my parent!?(cry)
6,720smolen
Fundamentals
5 kyu
Calculating with Functions
77,554BattleRattle
Functional Programming
6 kyu
Non-even substrings
1,466KenKamau
Strings
Fundamentals
6 kyu
Prime Factors
3,375kgashok
Algorithms
6 kyu
The Supermarket Queue
48,265mattlub
Arrays
Fundamentals
6 kyu
Elimination Tournament
1,071JOLee83
Arrays
Fundamentals
Algorithms
6 kyu
Unknown amount of duplicates. One missing number.
1,113raulbc777
Fundamentals
Mathematics
Arrays
Algorithms
Sorting
Performance
6 kyu
Car Number Plate Calculator
1,517W_2004
Algorithms
Logic
Mathematics
Fundamentals
6 kyu
Vowels Back
1,673PG1
Fundamentals
Strings
Arrays
Algorithms
6 kyu
Statistics for an Athletic Association
9,907g964
Fundamentals
Strings
Statistics
Mathematics
Data Science
6 kyu
Diagnosing Hypertension
355GitQuick
Strings
Arrays
Fundamentals
6 kyu
Back and forth then Reverse!
1,773RNOH
Algorithms
Performance
Arrays
6 kyu
FIRE and FURY
1,160dinglemouse
Regular Expressions
Strings
Algorithms
7 kyu
String doubles
2,357KenKamau
Strings
Algorithms
5 kyu
What doesn't belong to these?
202user5036852
Mathematics
Arrays
Puzzles
Algorithms
6 kyu
Help Mrs Jefferson
1,044raulbc777
Fundamentals
Data Structures
Arrays
Mathematics
5 kyu
Closest and Smallest
3,155g964
Fundamentals
Sorting
5 kyu
Lazy Repeater
7,141nklein
Iterators
Algorithms
6 kyu
Pokemon Damage Calculator
4,019yaphi1
Arrays
Games
Strings
Puzzles
7 kyu
Sort rectangles and circles by area II
2,444JohanWiltink
Fundamentals
Algorithms
Sorting
Mathematics
Geometry
6 kyu
Buying a car
17,492g964
Fundamentals
Mathematics
5 kyu
Rotate an array matrix
2,244jnicol
Matrix
Arrays
Algorithms
6 kyu
Millipede of words
843RealSup
Algorithms
Arrays
Strings
6 kyu
Function composition
8,908matthewglover
Functional Programming
Fundamentals
7 kyu
Grid index
1,876topping
Lists
Fundamentals
6 kyu
Olympiad podium
121ostaladaFab
Algorithms
6 kyu
Card game
427Dmitry Kudla
Algorithms
Games
Strings
6 kyu
Checkered Board
1,316Katbow
Strings
ASCII Art
Fundamentals
6 kyu
Zeros and Ones
763kodejuice
Puzzles
Logic
Algorithms
7 kyu
Next Element Generator
242chronikum
Algorithms
Arrays
Iterators
Fundamentals
7 kyu
Strange principal
1,275bereket2015
Mathematics
Algorithms
Fundamentals
5 kyu
PaginationHelper
37,831jhoffner
Object-oriented Programming
Arrays
Algorithms
6 kyu
Crashing Boxes
452marbiru
Fundamentals
7 kyu
Sums of consecutive integers
1,710andrewferk
Mathematics
Algorithms
6 kyu
Cylon Evolution
2,033opheliasdaisies
Object-oriented Programming
Fundamentals
5 kyu
Basic Nico variation
1,100dcieslak
Ciphers
Strings
Fundamentals
6 kyu
up AND down
2,971g964
Fundamentals
Strings
6 kyu
Bracket Duplicates
945jpchou
Strings
Regular Expressions
Algorithms
7 kyu
Honey to the Bee
2,541yorky001
Debugging
Object-oriented Programming