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
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
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
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
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Multitap Input
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
All Languages
><>
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
ALGOL 68
APL
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
Luau
Odin
Picat
Qore
Racket
Rebol
Rexx
Scala
Squirrel
Stax
Uiua
Umka
Vala
Vyxal
Bytes
Chars
Scoring
Bytes
Chars
Language
All
><>
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
ALGOL 68
APL
ArkScript
Arturo
Befunge
BQN
CJam
CoffeeScript
Egel
Fennel
Harbour
Hare
Haxe
Hush
Hy
iogii
Knight
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
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
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
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
Apéry’s Constant
Binary Lambda Calculus
Connect Four
Continued Fractions
Crossword
CSS Colors (Inverse)
CSS Grid
Ellipse Perimeters
Flags
Floyd-Steinberg Dithering
Gray Code Decoder
Gray Code Encoder
Hexagonal Spiral
Highly Composite Numbers
Multitap Input
NFA Simulator
Numbrix
Odd Polyomino Tiling
p-adic Expansion
Polygon Triangulations
QR Encoder
Quadratic Formula
Semiprime Numbers
Smooth Numbers
Snake
Sphenic Numbers
Taxicab Numbers
Turtle
Tutorial
Hole
Golfer
Chars
Time
Submitted
π
Andrey2001
1,006
3ms
7 hours ago
Proximity Grid
commandz0
83
66ms
10 hours ago
Odious Numbers (Long)
commandz0
12
6ms
17 hours ago
Odious Numbers
commandz0
11
3ms
17 hours ago
Number Spiral
commandz0
34
3ms
17 hours ago
N Queens
commandz0
36
178ms
18 hours ago
Fractions
ovs-code
30
42ms
20 hours ago
Multitap Input
ovs-code
36
5ms
20 hours ago
Sudoku (Fill-in)
commandz0
125
1,474ms
21 hours ago
Collatz
plcc0
37
159ms
22 hours ago
Prime Numbers
plcc0
18
4ms
23 hours ago
Tutorial
dokutan
35
4ms
26 hours ago
brainfuck
ndren
164
2,461ms
33 hours ago
ASCII Table
commandz0
81
3ms
3 days ago
Day of Week
commandz0
43
6ms
3 days ago
Diamonds
padril
54
4ms
3 days ago
ln 2
commandz0
584
3ms
4 days ago
Evil Numbers (Long)
commandz0
14
5ms
4 days ago
Evil Numbers
commandz0
12
2ms
4 days ago
Diamonds
commandz0
36
4ms
4 days ago
Evil Numbers (Long)
NicoBliss
16
3ms
4 days ago
Evil Numbers
NicoBliss
14
2ms
4 days ago
ln 2
NicoBliss
995
2ms
4 days ago
Diamonds
NicoBliss
57
3ms
4 days ago
Multitap Input
AlephSquirrel
40
4ms
5 days ago
Kolakoski Sequence
padril
43
7ms
5 days ago
Fibonacci
padril
12
3ms
5 days ago
Pascal’s Triangle
padril
40
2ms
5 days ago
Odious Numbers (Long)
Nxllpointer
14
3ms
6 days ago
Prime Numbers
Nxllpointer
18
3ms
6 days ago
Vampire Numbers
Nxllpointer
1,383
2ms
6 days ago
Pangram Grep
Nxllpointer
25
4ms
7 days ago
Happy Numbers (Long)
Nxllpointer
23
3ms
7 days ago
Happy Numbers
Nxllpointer
22
3ms
7 days ago
Divisors
Nxllpointer
23
3ms
7 days ago
Arithmetic Numbers
Nxllpointer
27
861ms
7 days ago
Niven Numbers (Long)
Nxllpointer
22
17ms
7 days ago
Collatz
commandz0
33
566ms
7 days ago
Pascal’s Triangle
ndren
23
2ms
8 days ago
Look and Say
Nxllpointer
18
4ms
8 days ago
Tutorial
Mefred
80
4ms
10 days ago
Niven Numbers
yanqui-uxo
23
3ms
12 days ago
Kolakoski Sequence
ndren
30
4ms
13 days ago
Card Number Validation
NicoBliss
47
10ms
14 days ago
Reverse Polish Notation
KatieLG
78
9ms
14 days ago
Spelling Numbers
KatieLG
31,452
22ms
14 days ago
SI Units
KatieLG
14,262
17ms
14 days ago
Rock-paper-scissors-Spock-lizard
KatieLG
410
3ms
14 days ago
Musical Chords
KatieLG
4,847
10ms
14 days ago
Flags
KatieLG
3,925
8ms
14 days ago
Emojify
KatieLG
230
3ms
14 days ago
CSS Colors (Inverse)
KatieLG
2,799
6ms
14 days ago
CSS Colors
KatieLG
2,973
6ms
14 days ago
Billiards
KatieLG
13,836
7ms
14 days ago
Lucky Tickets
KatieLG
2,905
9ms
14 days ago
Taxicab Numbers
KatieLG
4,647
3ms
14 days ago
Polygon Triangulations
KatieLG
4,510
3ms
14 days ago
Apéry’s Constant
KatieLG
1,006
2ms
14 days ago
Card Number Validation
KatieLG
56
5ms
14 days ago
ASCII Table
NicoBliss
85
3ms
14 days ago
Arabic to Roman
commandz0
74
58ms
14 days ago
Divisors
commandz0
28
3ms
14 days ago
Christmas Trees
commandz0
34
3ms
14 days ago
Card Number Validation
commandz0
43
4ms
14 days ago
Arithmetic Numbers
commandz0
26
1,000ms
14 days ago
Roman to Arabic
commandz0
51
44ms
14 days ago
Tutorial
commandz0
31
3ms
14 days ago
Fizz Buzz
NicoBliss
50
3ms
15 days ago
Tutorial
NicoBliss
80
4ms
15 days ago
Arithmetic Numbers
NicoBliss
31
894ms
15 days ago
Abundant Numbers (Long)
NicoBliss
22
17ms
15 days ago
Arabic to Roman
NicoBliss
114
34ms
15 days ago
Abundant Numbers
NicoBliss
21
4ms
15 days ago
Abundant Numbers (Long)
commandz0
22
18ms
15 days ago
Abundant Numbers
commandz0
21
4ms
15 days ago
Prime Numbers
quintuple-mallard
18
3ms
15 days ago
Pernicious Numbers
Garklein
15
2ms
15 days ago
Pernicious Numbers
shadowninja55
15
2ms
15 days ago
Odious Numbers (Long)
shadowninja55
12
5ms
15 days ago
Odious Numbers
shadowninja55
11
3ms
15 days ago