The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. Why not try and solve them ahead of time?
Gray Code Decoder in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 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 Gray Code Decoder Gray Code Encoder 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 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 Gray Code Decoder Gray Code Encoder 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 # Golfer Points Bytes Time Submitted 160th hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 160th Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 160th Natanaelel 🇸🇪 0 75 19ms 11 May 2025 160th commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 160th albanian-laundromat 0 75 108ms 5 Jan 2026 160th albanian-laundromat 0 75 455ms 6 Jan 2026 160th GolfingSuccess 🇬🇷 0 75 18ms 11 Jan 2026 160th albanian-laundromat 0 75 238ms 22 days ago 160th madex 🇩🇪 0 75 18ms 6 days ago 160th CaedenHarper 🇨🇦 0 75 149ms 3 days ago 160th fuzzylojik-golf 🇺🇸 0 75 123ms 24 hours ago 160th Yax42 🇫🇷 0 75 4ms 5 hours ago 173rd Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 173rd edsrzf 🇳🇿 0 76 114ms 10 May 2025 173rd ovs-code 🇩🇪 0 76 3ms 10 May 2025 173rd AlephSquirrel 0 76 43ms 3 Dec 2025 173rd AlephSquirrel 0 76 445ms 3 Dec 2025 173rd albanian-laundromat 0 76 18ms 21 days ago 173rd albanian-laundromat 0 76 188ms 15 days ago 173rd MeWhenI 🇻🇦 0 76 586ms 8 days ago 181st CornerMercury 🇬🇧 0 77 18ms 3 Dec 2024 181st ndren 0 77 20ms 3 Dec 2024 181st lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 181st Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 181st DialFrost 🇸🇬 0 77 19ms 8 May 2025 181st emgordon154 0 77 161ms 9 May 2025 181st edsrzf 🇳🇿 0 77 1,938ms 9 May 2025 181st Natanaelel 🇸🇪 0 77 3ms 11 May 2025 181st addmai 0 77 20ms 24 Jul 2025 181st hiichbindermax 0 77 19ms 17 Aug 2025 181st 5cw 🇺🇸 0 77 18ms 22 Aug 2025 181st davecame 0 77 150ms 25 Sep 2025 181st SirBogman 🇺🇸 0 77 240ms 13 Oct 2025 181st jtaxen 0 77 19ms 16 Oct 2025 181st albanian-laundromat 0 77 19ms 25 Nov 2025 181st albanian-laundromat 0 77 412ms 6 Dec 2025 181st anter69 🇭🇺 0 77 139ms 4 Feb 2026 181st Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 181st KasperKivimaeki 🇫🇮 0 77 564ms 8 days ago 181st StefanHabel 🇨🇦 0 77 1,207ms 18 hours ago 181st ahmetdemirag 🇨🇾 0 77 18ms 12 hours ago 181st tomh1012 0 77 17ms 11 hours ago 181st HumanoidCPU 0 77 230ms 23 mins ago 204th jameswmccarty 0 78 20ms 29 Mar 2025 204th DialFrost 🇸🇬 0 78 940ms 10 May 2025 204th DialFrost 🇸🇬 0 78 3ms 10 May 2025 204th solisolu 0 78 20ms 10 Nov 2025 208th BREMAUCY 🇫🇷 0 79 18ms 14 hours ago 208th Andrey2001 0 79 18ms 8 hours ago 210th Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 210th error256 0 80 466ms 16 Jan 2026 210th madex 🇩🇪 0 80 378ms 17 hours ago 213th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 214th bricknellj 0 82 17ms 30 Jan 2025 214th dokutan 0 82 17ms 15 Aug 2025 214th scpchicken 🇵🇼 0 82 402ms 24 hours ago 214th KatieLG 🇬🇧 0 82 18ms 24 hours ago 214th madex 🇩🇪 0 82 4ms 17 hours ago 219th GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 219th GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 219th error256 0 83 430ms 12 Jan 2026 219th albanian-laundromat 0 83 9ms 26 Jan 2026 223rd Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 223rd edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 223rd albanian-laundromat 0 85 92ms 6 Dec 2025 223rd GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 227th kg583 🇺🇸 0 86 23ms 2 Oct 2025 227th GolfingSuccess 🇬🇷 0 86 2,109ms 15 days ago 229th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 229th CaedenHarper 🇨🇦 0 87 439ms 20 mins ago 231st edsrzf 🇳🇿 0 88 2,094ms 15 May 2025 231st muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 231st solisolu 0 88 3ms 11 Nov 2025 231st albanian-laundromat 0 88 1,372ms 5 Jan 2026 231st error256 0 88 3,067ms 14 Jan 2026 231st IanUtley 0 88 2,941ms 16 Jan 2026 231st edsrzf 🇳🇿 0 88 26ms 4 hours ago 238th Shanethegamer 🇺🇸 0 89 99ms 13 Dec 2024 238th GolfingSuccess 🇬🇷 0 89 65ms 12 Jan 2026 240th sean-niemann 🇺🇸 0 90 7ms 10 May 2025 First Prev 161–240 of 305 Next Last