Recent Solutions
Achievements
Cheevos
Golfers
Solutions
All Holes
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
Continued Fractions
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Gray Code Decoder
Gray Code Encoder
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Multitap Input
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
ALGOL 68
ArkScript
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
05AB1E
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
ALGOL 68
ArkScript
Assembly
AWK
Bash
BASIC
Berry
brainfuck
C
C#
C++
Civet
Clojure
COBOL
Coconut
Common Lisp
Crystal
D
Dart
Elixir
Erlang
F#
Factor
Forth
Fortran
Gleam
Go
GolfScript
Groovy
Haskell
Hexagony
J
Janet
Java
JavaScript
jq
Julia
K
Kotlin
Lua
Nim
OCaml
Pascal
Perl
PHP
PowerShell
Prolog
Python
R
Raku
Rockstar
Ruby
Rust
Scheme
sed
SQL
Swift
Tcl
TeX
V
VimL
Wren
Zig
Experimental Language
05AB1E
APL
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Lily
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Hole
All
12 Days of Christmas
24 Game
99 Bottles of Beer
Abundant Numbers
Abundant Numbers (Long)
Arabic to Roman
Arithmetic Numbers
Arrows
Ascending Primes
ASCII Table
Billiards
brainfuck
Calendar
Card Number Validation
Catalan Numbers
Catalan’s Constant
Christmas Trees
Collatz
Continued Fractions
CSS Colors
Cubes
Day of Week
DFA Simulator
Diamonds
Divisors
Emirp Numbers
Emirp Numbers (Long)
Emojify
Evil Numbers
Evil Numbers (Long)
Factorial Factorisation
Farey Sequence
Fibonacci
Fizz Buzz
Foo Fizz Buzz Bar
Forsyth–Edwards Notation
Fractions
Game of Life
Gijswijt’s Sequence
Gray Code Decoder
Gray Code Encoder
Happy Numbers
Happy Numbers (Long)
Hexdump
Hilbert Curve
Intersection
Inventory Sequence
ISBN
Jacobi Symbol
Kaprekar Numbers
Kolakoski Constant
Kolakoski Sequence
Leap Years
Levenshtein Distance
Leyland Numbers
ln 2
Look and Say
Lucky Numbers
Lucky Tickets
Mahjong
Mandelbrot
Maze
Medal Tally
Minesweeper
Morse Decoder
Morse Encoder
Multitap Input
Musical Chords
N Queens
Niven Numbers
Niven Numbers (Long)
Number Spiral
Odious Numbers
Odious Numbers (Long)
Ordinal Numbers
PalindromemordnilaP
Pangram Grep
Partition Numbers
Pascal’s Triangle
Pernicious Numbers
Pernicious Numbers (Long)
Poker
Polyominoes
Prime Numbers
Prime Numbers (Long)
Proximity Grid
QR Decoder
Quine
Recamán
Repeating Decimals
Reverse Polish Notation
Reversi
Rijndael S-box
Rock-paper-scissors-Spock-lizard
Roman to Arabic
ROT13
Rule 110
Scrambled Sort
Set
Seven Segment
SI Units
Sierpiński Triangle
Smith Numbers
Spelling Numbers
Star Wars GPT
Star Wars Opening Crawl
Sudoku
Sudoku (Fill-in)
Ten-pin Bowling
Tic-tac-toe
Time Distance
Tongue-twisters
Topological Sort
Tower of Hanoi
Transpose Sentence
Trinomial Triangle
United States
Vampire Numbers
Van Eck Sequence
Zeckendorf Representation
Zodiac Signs
γ
λ
π
τ
φ
√2
𝑒
Experimental Hole
Alphabetic Numbers
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Hexagonal Spiral
Highly Composite Numbers
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Rectangle Fill
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Chars
Time
Submitted
Kaprekar Numbers
DialFrost
💎
58
3,152ms
8 hours ago
Van Eck Sequence
jusaka
2,569
3ms
13 hours ago
Vampire Numbers
jusaka
1,085
3ms
13 hours ago
Trinomial Triangle
jusaka
2,094
4ms
13 hours ago
Taxicab Numbers
jusaka
4,174
4ms
13 hours ago
Smith Numbers
jusaka
1,838
5ms
13 hours ago
Rijndael S-box
jusaka
782
4ms
13 hours ago
Recamán
jusaka
911
4ms
13 hours ago
Prime Numbers (Long)
jusaka
5,962
3ms
13 hours ago
Polygon Triangulations
jusaka
4,326
5ms
13 hours ago
Pascal’s Triangle
jusaka
783
4ms
13 hours ago
Partition Numbers
jusaka
661
3ms
13 hours ago
Odious Numbers (Long)
jusaka
1,959
3ms
13 hours ago
N Queens
jusaka
1,260
4ms
13 hours ago
Lucky Numbers
jusaka
4,834
5ms
13 hours ago
Look and Say
jusaka
1,293
5ms
13 hours ago
Leyland Numbers
jusaka
900
3ms
13 hours ago
Leap Years
jusaka
744
3ms
13 hours ago
Kaprekar Numbers
jusaka
454
4ms
13 hours ago
Inventory Sequence
jusaka
2,637
5ms
13 hours ago
Highly Composite Numbers
jusaka
406
6ms
13 hours ago
Happy Numbers (Long)
jusaka
566
3ms
13 hours ago
Gijswijt’s Sequence
jusaka
3,007
4ms
13 hours ago
Fizz Buzz
jusaka
427
4ms
13 hours ago
Farey Sequence
jusaka
5,136
5ms
13 hours ago
Evil Numbers (Long)
jusaka
1,964
4ms
13 hours ago
Emirp Numbers (Long)
jusaka
1,170
5ms
13 hours ago
Divisors
jusaka
1,180
3ms
13 hours ago
12 Days of Christmas
jusaka
2,383
4ms
13 hours ago
Collatz
jusaka
3,240
6ms
13 hours ago
Abundant Numbers (Long)
jusaka
978
5ms
13 hours ago
Catalan Numbers
jusaka
2,886
4ms
13 hours ago
Alphabetic Numbers
jusaka
3,909
7ms
13 hours ago
Ascending Primes
jusaka
619
3ms
13 hours ago
𝑒
jusaka
1,013
4ms
13 hours ago
φ
jusaka
1,013
4ms
13 hours ago
τ
jusaka
1,013
4ms
13 hours ago
π
jusaka
1,013
4ms
13 hours ago
λ
jusaka
1,013
3ms
13 hours ago
γ
jusaka
1,013
3ms
13 hours ago
√2
jusaka
1,013
5ms
13 hours ago
Apéry’s Constant
jusaka
1,013
4ms
13 hours ago
Kolakoski Sequence
jusaka
2,010
3ms
13 hours ago
ln 2
jusaka
1,013
3ms
13 hours ago
Kolakoski Constant
jusaka
1,013
3ms
13 hours ago
Catalan’s Constant
jusaka
1,013
3ms
13 hours ago
Prime Numbers
jusaka
85
3ms
13 hours ago
Pernicious Numbers
jusaka
114
3ms
13 hours ago
Odious Numbers
jusaka
87
4ms
13 hours ago
Niven Numbers
jusaka
105
4ms
13 hours ago
Happy Numbers
jusaka
121
4ms
13 hours ago
Fibonacci
jusaka
148
5ms
13 hours ago
Evil Numbers
jusaka
84
4ms
13 hours ago
Emirp Numbers
jusaka
150
4ms
13 hours ago
Abundant Numbers
jusaka
177
3ms
13 hours ago
Topological Sort
madex
155
23ms
17 hours ago
Ascending Primes
DialFrost
79
7ms
32 hours ago
Multitap Input
scpchicken
96
4ms
33 hours ago
Musical Chords
scpchicken
149
40ms
36 hours ago
ROT13
retrohun
124
3ms
3 days ago
Sudoku (Fill-in)
scpchicken
🥈
140
117ms
3 days ago
DFA Simulator
scpchicken
🥈
93
59ms
3 days ago
Arabic to Roman
retrohun
147
9ms
3 days ago
Star Wars Opening Crawl
scpchicken
134
6ms
3 days ago
Ordinal Numbers
scpchicken
47
4ms
4 days ago
Musical Chords
madex
390
4ms
4 days ago
Morse Encoder
madex
334
3ms
4 days ago
Hilbert Curve
madex
646
5ms
4 days ago
Mahjong
madex
🥈
609
14ms
4 days ago
CSS Colors
madex
2,979
3ms
4 days ago
Van Eck Sequence
madex
74
3ms
4 days ago
Christmas Trees
madex
75
3ms
4 days ago
Diamonds
madex
92
4ms
4 days ago
Catalan Numbers
madex
54
30ms
4 days ago
Happy Numbers
madex
75
64ms
4 days ago
Pascal’s Triangle
madex
64
3ms
4 days ago
Collatz
madex
63
6ms
4 days ago
Tower of Hanoi
madex
93
3ms
4 days ago
Forsyth–Edwards Notation
denkyuu1
77
3ms
4 days ago
Look and Say
madex
52
3ms
5 days ago