The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 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 237th addmai 0 77 20ms 24 Jul 2025 237th hiichbindermax 0 77 17ms 17 Aug 2025 237th 5cw 🇺🇸 0 77 18ms 22 Aug 2025 237th davecame 0 77 135ms 25 Sep 2025 237th SirBogman 🇺🇸 0 77 232ms 13 Oct 2025 237th jtaxen 0 77 19ms 16 Oct 2025 237th albanian-laundromat 0 77 19ms 25 Nov 2025 237th albanian-laundromat 0 77 412ms 6 Dec 2025 237th anter69 🇭🇺 0 77 139ms 4 Feb 2026 237th Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 237th KasperKivimaeki 🇫🇮 0 77 564ms 13 days ago 237th StefanHabel 🇨🇦 0 77 1,217ms 5 days ago 237th ahmetdemirag 🇨🇾 0 77 18ms 5 days ago 237th tomh1012 0 77 17ms 5 days ago 237th HumanoidCPU 0 77 230ms 4 days ago 237th qpwoeirut 0 77 20ms 4 days ago 237th btjones0 0 77 19ms 4 days ago 237th ComradeSquirrel 0 77 18ms 4 days ago 237th bzijlema 🇳🇱 0 77 18ms 4 days ago 237th Lv0Sys 🇵🇱 0 77 18ms 3 days ago 237th stefangimmillaro 0 77 136ms 14 hours ago 237th LostSyntax21 🇬🇧 0 77 18ms 4 hours ago 263rd jameswmccarty 0 78 19ms 29 Mar 2025 263rd DialFrost 🇸🇬 0 78 3ms 10 May 2025 263rd solisolu 0 78 20ms 10 Nov 2025 263rd madex 🇩🇪 0 78 3ms 2 days ago 263rd madex 🇩🇪 0 78 91ms 23 hours ago 268th BREMAUCY 🇫🇷 0 79 18ms 5 days ago 268th Andrey2001 0 79 18ms 5 days ago 268th edsrzf 🇳🇿 0 79 30ms 4 days ago 268th mishak-sys 0 79 411ms 3 days ago 268th madex 🇩🇪 0 79 29ms 23 hours ago 273rd Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 273rd error256 0 80 466ms 16 Jan 2026 273rd albanian-laundromat 0 80 29ms 4 days ago 276th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 276th Lv0Sys 🇵🇱 0 81 437ms 3 days ago 276th Aquateraneal 🇺🇸 0 81 19ms 2 days ago 276th luuumine 🇫🇷 0 81 16ms 2 days ago 276th acollett89 0 81 14ms 2 days ago 276th KatieLG 🇬🇧 0 81 67ms 4 hours ago 282nd bricknellj 0 82 17ms 30 Jan 2025 282nd dokutan 0 82 17ms 15 Aug 2025 282nd scpchicken 🇵🇼 0 82 402ms 5 days ago 282nd KatieLG 🇬🇧 0 82 18ms 5 days ago 282nd MeWhenI 🇻🇦 0 82 105ms 3 days ago 282nd solisolu 0 82 4ms 3 days ago 282nd MeWhenI 🇻🇦 0 82 391ms 41 hours ago 289th GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 289th GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 289th error256 0 83 430ms 12 Jan 2026 289th albanian-laundromat 0 83 9ms 26 Jan 2026 289th edsrzf 🇳🇿 0 83 473ms 4 days ago 289th edsrzf 🇳🇿 0 83 1,251ms 4 days ago 289th edsrzf 🇳🇿 0 83 106ms 3 days ago 289th Steffan153 🇫🇮 0 83 416ms 3 days ago 289th msbranicky 0 83 18ms 2 days ago 298th madex 🇩🇪 0 84 373ms 19 hours ago 299th Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 299th edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 299th albanian-laundromat 0 85 98ms 6 Dec 2025 299th GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 299th edsrzf 🇳🇿 0 85 28ms 4 days ago 304th kg583 🇺🇸 0 86 23ms 2 Oct 2025 304th GolfingSuccess 🇬🇷 0 86 2,109ms 20 days ago 306th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 306th CaedenHarper 🇨🇦 0 87 439ms 4 days ago 306th madex 🇩🇪 0 87 13ms 2 days ago 309th muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 309th albanian-laundromat 0 88 1,372ms 5 Jan 2026 309th error256 0 88 3,067ms 14 Jan 2026 309th IanUtley 0 88 2,941ms 16 Jan 2026 313th Shanethegamer 🇺🇸 0 89 107ms 13 Dec 2024 313th GolfingSuccess 🇬🇷 0 89 64ms 12 Jan 2026 315th sean-niemann 🇺🇸 0 90 7ms 10 May 2025 315th dokutan 0 90 65ms 8 Feb 2026 317th ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 317th error256 0 91 62ms 12 Jan 2026 317th error256 0 91 293ms 14 Jan 2026 317th GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 First Prev 241–320 of 406 Next Last