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Ad
7 kyu
Chinese Zodiac
1,993AcesOfGlory
Fundamentals
Arrays
7 kyu
Romanize Russian Passports
236bdupau
Strings
Fundamentals
5 kyu
Japanese Romaji-to-Hiragana Converter
112ewingsa
Logic
Strings
Parsing
Fundamentals
6 kyu
Numericals of a String
3,545Jomopipi
Puzzles
Performance
Algorithms
Retired
Simple transposition (retired)
2,887mariohernandezv
Algorithms
Cryptography
Fundamentals
5 kyu
Human Readable Time
144,270BattleRattle
Date Time
Mathematics
Algorithms
7 kyu
draw me a chessboard
2,510andrewMacmurray
Puzzles
Fundamentals
ASCII Art
Algorithms
6 kyu
Rectangle into Squares
32,676g964
Fundamentals
Geometry
Puzzles
6 kyu
Find within array
3,530kylehill
Arrays
Functional Programming
Fundamentals
6 kyu
Duplicate Arguments
4,374lunitik
Algorithms
4 kyu
Find the unknown digit
8,210JJ-Bug
Mathematics
Algorithms
Puzzles
6 kyu
Playing with digits
138,938g964
Fundamentals
Mathematics
4 kyu
Sum Strings as Numbers
44,034nicknovitski
Strings
Big Integers
Algorithms
7 kyu
Digital cypher
8,033dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Digital cypher vol 2
3,202dcieslak
Fundamentals
Ciphers
Cryptography
5 kyu
Calculate Variance
2,555eerwitt
Statistics
Mathematics
Algorithms
6 kyu
Berlin Clock
544dupreesi
Date Time
Strings
Fundamentals
6 kyu
Easy Diagonal
2,253g964
Fundamentals
7 kyu
Regexp Basics - is it a vowel?
9,168taw
Regular Expressions
Fundamentals
8 kyu
Regexp Basics - is it a digit?
16,373taw
Regular Expressions
Fundamentals
7 kyu
Regexp Basics - is it a letter?
8,107taw
Regular Expressions
Fundamentals
6 kyu
Regexp basics - parsing time
873taw
Regular Expressions
Fundamentals
6 kyu
Regexp basics - parsing mana cost
373taw
Regular Expressions
Fundamentals
7 kyu
Regexp basics - parsing prices
1,473taw
Regular Expressions
Fundamentals
6 kyu
Regexp basics - parsing integers
431taw
Regular Expressions
Fundamentals
6 kyu
Regexp Basics - is it IPv4 address?
2,716taw
Regular Expressions
Fundamentals
7 kyu
Regexp Basics - is it a eight bit signed number?
903taw
Bits
Binary
Strings
Regular Expressions
Fundamentals
7 kyu
Regexp Basics - is it all whitespace?
1,443taw
Regular Expressions
Fundamentals
Retired
Largest product in a series (retired)
107Raulvv
Status:Retired
Mathematics
Algorithms
7 kyu
Evens and Odds
6,962ocirion
Fundamentals
Binary
8 kyu
Basic Mathematical Operations
220,291Quickz
Mathematics
Fundamentals
7 kyu
Sum of integers in string
10,900kingcobra
Fundamentals
6 kyu
Digital cypher vol 3 - missing key
1,042dcieslak
Fundamentals
Ciphers
Cryptography
7 kyu
Birthday I - Cake
7,189PG1
Fundamentals
Arrays
Mathematics
4 kyu
Matrix Determinant
23,250pjfranzini
Matrix
Linear Algebra
Mathematics
Recursion
Algorithms
6 kyu
Basic Encryption
3,249Tandyman
Mathematics
Strings
Ciphers
5 kyu
Rot13
92,718Rubikan
Ciphers
Fundamentals
5 kyu
ROT13
26,506hvaara
Strings
Ciphers
Regular Expressions
Algorithms
6 kyu
Simple ROT13.5 cypher
673user9247539
Algorithms
Fundamentals
Ciphers
Cryptography
6 kyu
ROT13 variant cipher
635user8580805
Cryptography
Security
Strings
Algorithms
7 kyu
Cipher
579bubmet
Algorithms
Ciphers
Cryptography
Strings
4 kyu
Vigenère Cipher Helper
8,373jacobb
Algorithms
Ciphers
Security
Object-oriented Programming
Strings
6 kyu
Tribonacci Sequence
155,054GiacomoSorbi
Number Theory
Arrays
Lists
Fundamentals
6 kyu
Fibonacci, Tribonacci and friends
13,329GiacomoSorbi
Arrays
Lists
Number Theory
Fundamentals
5 kyu
Primes in numbers
29,718g964
Fundamentals
Mathematics
6 kyu
A Rule of Divisibility by 13
15,746g964
Fundamentals
Algorithms
Mathematics
7 kyu
A Rule of Divisibility by 7
12,674g964
Fundamentals
7 kyu
Is n divisible by (...)?
7,662IVBakker
Fundamentals
7 kyu
Simple Fun #320: Scratch lottery I
1,124myjinxin2015
Puzzles
Regular Expressions
6 kyu
Count the smiley faces!
97,312St3f4n
Regular Expressions
Fundamentals
Retired
Count the Characters (retired)
3,679davidhu2000
Fundamentals
Regular Expressions
Algorithms
6 kyu
Count the days!
2,113zruF
Date Time
Fundamentals
6 kyu
Minutes to Midnight
1,135zruF
Date Time
Fundamentals
5 kyu
Guess The Gifts!
3,706BattleRattle
Algorithms
5 kyu
Integers: Recreation One
26,377g964
Fundamentals
Algorithms
7 kyu
Complementary DNA
225,366JustyFY
Strings
Fundamentals
6 kyu
Parse HTML/CSS Colors
2,718junthecoder
Fundamentals
Algorithms
Strings
Parsing
6 kyu
Regex Tic Tac Toe Win Checker
1,247tachyonlabs
Games
Regular Expressions
Fundamentals
7 kyu
Regex Match Generator: Alternation
282wthit56
Strings
Regular Expressions
Fundamentals
4 kyu
Human readable duration format
83,247davazp
Strings
Date Time
Algorithms
6 kyu
Vowel-consonant lexicon
600KenKamau
Strings
Arrays
Algorithms
5 kyu
ISBN-10 Validation
10,597nklein
Regular Expressions
Algorithms
4 kyu
Most frequently used words in a text
28,258markprzepiora
Strings
Filtering
Algorithms
Regular Expressions
6 kyu
Pyramid Array
18,767sahglie
Algorithms
5 kyu
Base64 Encoding
5,154joseph.varnado
Binary
Strings
Algorithms
6 kyu
Base Conversion
10,754BattleRattle
Strings
Mathematics
Algorithms
6 kyu
Persistent Bugger.
199,211joh_pot
Fundamentals
Mathematics
5 kyu
Not very secure
46,935mayrsascha
Regular Expressions
Strings
6 kyu
Run-length encoding
9,729bkaes
Strings
Algorithms
6 kyu
Valid Phone Number
19,910xDranik
Regular Expressions
Algorithms
6 kyu
Transformation iteration
255joh_pot
Strings
Fundamentals
5 kyu
Common Denominators
14,917g964
Fundamentals
Algorithms
Mathematics
6 kyu
Duplicate Encoder
222,912obnounce
Strings
Arrays
Fundamentals
Retired
Calculator (retired)
11,547obrok
Algorithms
Parsing
Logic
Strings
Expressions
Basic Language Features
Fundamentals
Retired
Friday the 13ths (retired)
2,977user5854572
Date Time
Strings
Fundamentals
6 kyu
ASCII Fun #1: X- Shape
1,597zruF
ASCII Art
5 kyu
Convert all the cases!
1,431AJFarmar
Strings
Regular Expressions
Algorithms
4 kyu
So Many Permutations!
47,814BattleRattle
Permutations
Strings
Algorithms
6 kyu
Array Helpers
23,118BattleRattle
Arrays
Fundamentals
Object-oriented Programming