The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 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 239th edsrzf 🇳🇿 0 79 30ms 24 hours ago 239th madex 🇩🇪 0 79 416ms 12 hours ago 243rd Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 243rd error256 0 80 466ms 16 Jan 2026 243rd stefangimmillaro 0 80 19ms 29 hours ago 243rd albanian-laundromat 0 80 29ms 29 hours ago 247th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 248th bricknellj 0 82 17ms 30 Jan 2025 248th dokutan 0 82 17ms 15 Aug 2025 248th scpchicken 🇵🇼 0 82 402ms 2 days ago 248th KatieLG 🇬🇧 0 82 18ms 2 days ago 248th madex 🇩🇪 0 82 4ms 2 days ago 248th MeWhenI 🇻🇦 0 82 114ms 11 hours ago 254th GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 254th GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 254th error256 0 83 430ms 12 Jan 2026 254th albanian-laundromat 0 83 9ms 26 Jan 2026 254th edsrzf 🇳🇿 0 83 473ms 28 hours ago 254th edsrzf 🇳🇿 0 83 1,251ms 26 hours ago 254th edsrzf 🇳🇿 0 83 106ms 7 mins ago 261st Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 261st edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 261st albanian-laundromat 0 85 92ms 6 Dec 2025 261st GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 261st edsrzf 🇳🇿 0 85 28ms 25 hours ago 266th kg583 🇺🇸 0 86 23ms 2 Oct 2025 266th GolfingSuccess 🇬🇷 0 86 2,109ms 17 days ago 268th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 268th CaedenHarper 🇨🇦 0 87 439ms 34 hours ago 270th muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 270th solisolu 0 88 3ms 11 Nov 2025 270th albanian-laundromat 0 88 1,372ms 5 Jan 2026 270th error256 0 88 3,067ms 14 Jan 2026 270th IanUtley 0 88 2,941ms 16 Jan 2026 275th Shanethegamer 🇺🇸 0 89 99ms 13 Dec 2024 275th GolfingSuccess 🇬🇷 0 89 64ms 12 Jan 2026 277th sean-niemann 🇺🇸 0 90 7ms 10 May 2025 277th dokutan 0 90 65ms 8 Feb 2026 279th ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 279th error256 0 91 62ms 12 Jan 2026 279th error256 0 91 293ms 14 Jan 2026 279th GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 279th Natanaelel 🇸🇪 0 91 333ms 43 hours ago 284th Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 284th Yax42 🇫🇷 0 92 68ms 40 hours ago 284th edsrzf 🇳🇿 0 92 18ms 2 hours ago 287th Yax42 🇫🇷 0 93 392ms 41 hours ago 288th Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 288th edsrzf 🇳🇿 0 94 459ms 20 May 2025 288th MeWhenI 🇻🇦 0 94 396ms 14 hours ago 288th edsrzf 🇳🇿 0 94 6ms 8 hours ago 288th albanian-laundromat 0 94 6ms 8 hours ago 293rd albanian-laundromat 0 95 114ms 6 Jan 2026 294th Shanethegamer 🇺🇸 0 96 427ms 3 Jun 2025 294th CaedenHarper 🇨🇦 0 96 416ms 36 hours ago 294th edsrzf 🇳🇿 0 96 32ms 36 hours ago 294th kumavale 0 96 155ms 6 hours ago 298th albanian-laundromat 0 97 44ms 6 Dec 2025 298th tomh1012 0 97 396ms 46 hours ago 300th error256 0 98 156ms 16 Jan 2026 300th albanian-laundromat 0 98 135ms 23 Feb 2026 300th edsrzf 🇳🇿 0 98 163ms 8 hours ago 303rd Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 304th edsrzf 🇳🇿 0 100 145ms 9 May 2025 304th emgordon154 0 100 7ms 9 May 2025 304th JOrE20 0 100 42ms 15 Dec 2025 307th rucin93 🇵🇱 0 101 373ms 21 days ago 308th fantaize 0 102 148ms 15 days ago 308th emgordon154 0 102 4ms 30 hours ago 310th CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 310th kasarino 0 104 4ms 16 hours ago 312th kg583 🇺🇸 0 106 38ms 9 May 2025 313th Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 313th AlephSquirrel 0 107 20ms 14 May 2025 315th CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 315th edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 315th albanian-laundromat 0 108 31ms 5 Jan 2026 315th albanian-laundromat 0 108 83ms 16 days ago 319th kg583 🇺🇸 0 109 43ms 23 days ago 319th GolfingSuccess 🇬🇷 0 109 46ms 22 days ago First Prev 241–320 of 351 Next Last