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
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
Calendar
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
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
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
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
Calendar
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
Arrows
snoozingnewt
121
211ms
6 hours ago
Pernicious Numbers (Long)
snoozingnewt
54
192ms
7 hours ago
Pangram Grep
snoozingnewt
🥉
40
406ms
7 hours ago
Odious Numbers (Long)
snoozingnewt
41
202ms
7 hours ago
Odious Numbers
snoozingnewt
40
218ms
7 hours ago
Niven Numbers
snoozingnewt
37
234ms
7 hours ago
Evil Numbers
snoozingnewt
40
204ms
7 hours ago
Evil Numbers (Long)
snoozingnewt
42
217ms
7 hours ago
Arithmetic Numbers
snoozingnewt
66
448ms
7 hours ago
Continued Fractions
Shanethegamer
127
299ms
10 hours ago
Pernicious Numbers
snoozingnewt
32
250ms
2 days ago
Quine
CornerMercury
🥇
32
359ms
2 days ago
Odious Numbers (Long)
Lv0Sys
42
320ms
2 days ago
τ
ndren
71
196ms
2 days ago
Niven Numbers (Long)
Lv0Sys
43
325ms
2 days ago
PalindromemordnilaP
HPWiz
🥇
58
206ms
2 days ago
γ
CornerMercury
48
216ms
3 days ago
φ
BREMAUCY
🥇
36
150ms
3 days ago
𝑒
BREMAUCY
🥇
29
194ms
3 days ago
γ
BREMAUCY
🥇
41
204ms
3 days ago
√2
BREMAUCY
🥇
34
1,673ms
3 days ago
π
BREMAUCY
🥇
30
171ms
3 days ago
τ
BREMAUCY
🥇
39
1,689ms
3 days ago
Catalan’s Constant
BREMAUCY
🥇
46
218ms
3 days ago
ln 2
BREMAUCY
🥇
40
1,764ms
3 days ago
Catalan Numbers
Lv0Sys
43
276ms
3 days ago
Multitap Input
Shanethegamer
128
388ms
3 days ago
Happy Numbers (Long)
Lv0Sys
67
358ms
4 days ago
Fractions
Lv0Sys
68
258ms
4 days ago
Van Eck Sequence
Lv0Sys
69
274ms
4 days ago
Emojify
Lv0Sys
184
435ms
5 days ago
π
CornerMercury
34
177ms
6 days ago
Leyland Numbers
Lv0Sys
56
921ms
6 days ago
United States
Lv0Sys
164
293ms
6 days ago
Tongue-twisters
prestosilver
544
153ms
6 days ago
Catalan Numbers
snoozingnewt
41
282ms
6 days ago
Abundant Numbers
Lv0Sys
47
309ms
6 days ago
Cubes
Lv0Sys
197
373ms
7 days ago
Leap Years
Lv0Sys
42
288ms
7 days ago
Poker
Lv0Sys
373
639ms
7 days ago
Day of Week
DialFrost
166
247ms
7 days ago
Fizz Buzz
CornerMercury
59
211ms
8 days ago
λ
Lv0Sys
189
326ms
8 days ago
Niven Numbers
Lv0Sys
39
292ms
8 days ago
Morse Decoder
Lv0Sys
187
594ms
9 days ago
Morse Encoder
Lv0Sys
191
259ms
9 days ago
λ
KatieLG
1,010
154ms
9 days ago
Van Eck Sequence
KatieLG
1,687
158ms
9 days ago
Vampire Numbers
KatieLG
1,039
147ms
9 days ago
Trinomial Triangle
KatieLG
1,843
160ms
9 days ago
Tongue-twisters
KatieLG
497
152ms
9 days ago
Smith Numbers
KatieLG
1,647
155ms
9 days ago
Sierpiński Triangle
KatieLG
222
154ms
9 days ago
Rule 110
KatieLG
2,057
156ms
9 days ago
Recamán
KatieLG
807
151ms
9 days ago
Prime Numbers (Long)
KatieLG
4,283
144ms
9 days ago
Prime Numbers
KatieLG
98
167ms
9 days ago
Polyominoes
KatieLG
1,351
152ms
9 days ago
Pernicious Numbers (Long)
KatieLG
14,046
155ms
9 days ago
Pernicious Numbers
KatieLG
127
145ms
9 days ago
Pascal’s Triangle
KatieLG
694
147ms
9 days ago
Partition Numbers
KatieLG
661
143ms
9 days ago
Odious Numbers (Long)
KatieLG
1,663
161ms
9 days ago
Odious Numbers
KatieLG
100
153ms
9 days ago
Niven Numbers (Long)
KatieLG
5,548
147ms
9 days ago
Niven Numbers
KatieLG
118
149ms
9 days ago
N Queens
KatieLG
1,184
155ms
9 days ago
Mandelbrot
KatieLG
575
151ms
9 days ago
Lucky Numbers
KatieLG
3,720
156ms
9 days ago
Look and Say
KatieLG
707
131ms
9 days ago
Leyland Numbers
KatieLG
899
154ms
9 days ago
Leap Years
KatieLG
603
158ms
9 days ago
Kolakoski Constant
KatieLG
1,010
151ms
9 days ago
Kaprekar Numbers
KatieLG
467
140ms
9 days ago
Inventory Sequence
KatieLG
1,735
145ms
9 days ago