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7 kyu
Isograms
253,455chunjef
Strings
Fundamentals
7 kyu
Nickname Generator
11,664cboha
Strings
Regular Expressions
Fundamentals
7 kyu
Digits explosion
17,860angellaa
Strings
Regular Expressions
Fundamentals
6 kyu
Reverse or rotate?
23,171g964
Algorithms
Strings
6 kyu
Multiples of 3 or 5
423,355jhoffner
Mathematics
Algorithms
6 kyu
Array Deep Count
12,954hannahcmtucker
Arrays
Recursion
Fundamentals
6 kyu
Valid string
2,469ryandao
Strings
Algorithms
Retired
Vasya - Clerk (retired)
54,207AlexIsHappy
Fundamentals
Mathematics
Algorithms
Logic
Numbers
Games
6 kyu
Sorting by bits
9,142kodejuice
Logic
Arrays
Algorithms
Data Structures
Fundamentals
Bits
Binary
Sorting
Retired
Uncurrying (retired)
377surtich
Status:Retired
Functional Programming
Fundamentals
7 kyu
The wheat/rice and chessboard problem
9,157GiacomoSorbi
Mathematics
Recursion
Puzzles
6 kyu
Mutual Recursion
8,183dnolan
Mathematics
Algorithms
Recursion
6 kyu
Function composition
9,154matthewglover
Functional Programming
Fundamentals
6 kyu
Function Composition
13,503user578387
Functional Programming
Fundamentals
7 kyu
The Coupon Code
30,513yaphi1
Date Time
Strings
Fundamentals
7 kyu
Unlucky Days
15,654suic
Date Time
4 kyu
Human readable duration format
82,318davazp
Strings
Date Time
Algorithms
7 kyu
My Language Skills
17,934anter69
Sorting
Arrays
Algorithms
6 kyu
Run-length encoding
9,701bkaes
Strings
Algorithms
6 kyu
Urban Dictionary
2,049joh_pot
Algorithms
Object-oriented Programming
7 kyu
Convert a linked list to a string
8,458donaldsebleung
Linked Lists
Recursion
Algorithms
5 kyu
Fun with trees: array to tree
3,343janitormeir
Trees
Arrays
Binary Trees
Data Structures
Algorithms