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 238th solisolu 0 78 20ms 10 Nov 2025 242nd BREMAUCY 🇫🇷 0 79 18ms 2 days ago 242nd Andrey2001 0 79 18ms 46 hours ago 242nd edsrzf 🇳🇿 0 79 30ms 28 hours ago 242nd madex 🇩🇪 0 79 416ms 15 hours ago 242nd mishak-sys 0 79 411ms 3 mins ago 247th Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 247th error256 0 80 466ms 16 Jan 2026 247th stefangimmillaro 0 80 19ms 33 hours ago 247th albanian-laundromat 0 80 29ms 32 hours ago 251st Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 251st Lv0Sys 🇵🇱 0 81 437ms 5 mins ago 253rd bricknellj 0 82 17ms 30 Jan 2025 253rd dokutan 0 82 17ms 15 Aug 2025 253rd scpchicken 🇵🇼 0 82 402ms 2 days ago 253rd KatieLG 🇬🇧 0 82 18ms 2 days ago 253rd madex 🇩🇪 0 82 4ms 2 days ago 253rd MeWhenI 🇻🇦 0 82 114ms 14 hours ago 253rd solisolu 0 82 4ms 101 mins ago 260th GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 260th GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 260th error256 0 83 430ms 12 Jan 2026 260th albanian-laundromat 0 83 9ms 26 Jan 2026 260th edsrzf 🇳🇿 0 83 473ms 31 hours ago 260th edsrzf 🇳🇿 0 83 1,251ms 30 hours ago 260th edsrzf 🇳🇿 0 83 106ms 3 hours ago 267th Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 267th edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 267th albanian-laundromat 0 85 92ms 6 Dec 2025 267th GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 267th edsrzf 🇳🇿 0 85 28ms 29 hours ago 272nd kg583 🇺🇸 0 86 23ms 2 Oct 2025 272nd GolfingSuccess 🇬🇷 0 86 2,109ms 17 days ago 274th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 274th CaedenHarper 🇨🇦 0 87 439ms 38 hours ago 276th muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 276th albanian-laundromat 0 88 1,372ms 5 Jan 2026 276th error256 0 88 3,067ms 14 Jan 2026 276th IanUtley 0 88 2,941ms 16 Jan 2026 280th Shanethegamer 🇺🇸 0 89 99ms 13 Dec 2024 280th GolfingSuccess 🇬🇷 0 89 64ms 12 Jan 2026 282nd sean-niemann 🇺🇸 0 90 7ms 10 May 2025 282nd dokutan 0 90 65ms 8 Feb 2026 284th ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 284th error256 0 91 62ms 12 Jan 2026 284th error256 0 91 293ms 14 Jan 2026 284th GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 284th Natanaelel 🇸🇪 0 91 333ms 46 hours ago 289th Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 289th Yax42 🇫🇷 0 92 68ms 44 hours ago 289th edsrzf 🇳🇿 0 92 18ms 6 hours ago 292nd Yax42 🇫🇷 0 93 392ms 44 hours ago 293rd Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 293rd edsrzf 🇳🇿 0 94 459ms 20 May 2025 293rd MeWhenI 🇻🇦 0 94 396ms 17 hours ago 293rd edsrzf 🇳🇿 0 94 6ms 11 hours ago 293rd albanian-laundromat 0 94 6ms 11 hours ago 298th albanian-laundromat 0 95 114ms 6 Jan 2026 299th Shanethegamer 🇺🇸 0 96 427ms 3 Jun 2025 299th CaedenHarper 🇨🇦 0 96 416ms 40 hours ago 299th edsrzf 🇳🇿 0 96 32ms 39 hours ago 299th kumavale 0 96 155ms 9 hours ago 303rd albanian-laundromat 0 97 44ms 6 Dec 2025 303rd tomh1012 0 97 396ms 2 days ago 305th error256 0 98 156ms 16 Jan 2026 305th albanian-laundromat 0 98 135ms 23 Feb 2026 305th edsrzf 🇳🇿 0 98 163ms 11 hours ago 308th Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 309th edsrzf 🇳🇿 0 100 145ms 9 May 2025 309th emgordon154 0 100 7ms 9 May 2025 309th JOrE20 0 100 42ms 15 Dec 2025 312th rucin93 🇵🇱 0 101 373ms 21 days ago 313th fantaize 0 102 148ms 15 days ago 313th emgordon154 0 102 4ms 34 hours ago 315th CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 315th kasarino 0 104 4ms 19 hours ago 317th kg583 🇺🇸 0 106 38ms 9 May 2025 318th Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 318th AlephSquirrel 0 107 20ms 14 May 2025 320th CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 First Prev 241–320 of 356 Next Last