The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 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 321st edsrzf 🇳🇿 0 100 145ms 9 May 2025 321st emgordon154 0 100 7ms 9 May 2025 321st JOrE20 0 100 42ms 15 Dec 2025 324th rucin93 🇵🇱 0 101 373ms 21 days ago 325th fantaize 0 102 148ms 16 days ago 325th emgordon154 0 102 4ms 46 hours ago 325th madex 🇩🇪 0 102 155ms 3 hours ago 328th CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 328th kasarino 0 104 4ms 32 hours ago 330th kg583 🇺🇸 0 106 38ms 9 May 2025 331st Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 331st AlephSquirrel 0 107 20ms 14 May 2025 333rd CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 333rd edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 333rd albanian-laundromat 0 108 31ms 5 Jan 2026 333rd albanian-laundromat 0 108 83ms 17 days ago 337th kg583 🇺🇸 0 109 43ms 23 days ago 337th GolfingSuccess 🇬🇷 0 109 46ms 23 days ago 337th edsrzf 🇳🇿 0 109 43ms 45 hours ago 337th edsrzf 🇳🇿 0 109 35ms 17 hours ago 341st retrohun 0 111 41ms 2 days ago 342nd GolfingSuccess 🇬🇷 0 112 44ms 24 Jan 2026 343rd Shanethegamer 🇺🇸 0 114 1,281ms 9 May 2025 343rd error256 0 114 513ms 29 Jan 2026 343rd edsrzf 🇳🇿 0 114 489ms 27 hours ago 346th GolfingSuccess 🇬🇷 0 117 283ms 12 Jan 2026 346th albanian-laundromat 0 117 43ms 15 days ago 348th CaedenHarper 🇨🇦 0 120 274ms 2 days ago 348th emgordon154 0 120 65ms 46 hours ago 350th Shanethegamer 🇺🇸 0 121 148ms 13 Dec 2024 350th elgan65536 🇺🇸 0 121 178ms 9 Feb 2026 352nd albanian-laundromat 0 122 264ms 5 Jan 2026 353rd stefangimmillaro 0 124 298ms 10 May 2025 353rd Shanethegamer 🇺🇸 0 124 150ms 3 Jun 2025 355th AstroOrbis 0 126 23ms 12 Aug 2025 355th btjones0 0 126 168ms 43 hours ago 357th JDiLenarda 🇫🇷 0 131 1,330ms 35 hours ago 358th HumanoidCPU 0 133 160ms 2 days ago 359th edsrzf 🇳🇿 0 136 4,806ms 19 May 2025 360th GolfingSuccess 🇬🇷 0 137 93ms 23 hours ago 361st Shanethegamer 🇺🇸 0 139 309ms 13 Dec 2024 361st UnderKoen 🇳🇱 0 139 1,178ms 36 hours ago 363rd Shanethegamer 🇺🇸 0 146 31ms 9 May 2025 364th canissimia 🇦🇶 0 152 18ms 5 hours ago 365th emgordon154 0 185 1,780ms 21 hours ago 366th albanian-laundromat 0 207 1,444ms 6 Jan 2026 367th albanian-laundromat 0 208 199ms 24 hours ago 368th emgordon154 0 235 1,475ms 5 hours ago 369th albanian-laundromat 0 265 68ms 8 Dec 2025 370th MeWhenI 🇻🇦 0 286 231ms 27 hours ago First Prev 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