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 318th kumavale 0 96 160ms 35 hours ago 322nd albanian-laundromat 0 97 44ms 6 Dec 2025 322nd tomh1012 0 97 396ms 3 days ago 324th error256 0 98 155ms 16 Jan 2026 324th albanian-laundromat 0 98 135ms 23 Feb 2026 324th edsrzf 🇳🇿 0 98 157ms 37 hours ago 327th Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 328th edsrzf 🇳🇿 0 100 145ms 9 May 2025 328th emgordon154 0 100 7ms 9 May 2025 328th JOrE20 0 100 42ms 15 Dec 2025 331st rucin93 🇵🇱 0 101 373ms 22 days ago 332nd fantaize 0 102 150ms 16 days ago 332nd emgordon154 0 102 4ms 2 days ago 332nd madex 🇩🇪 0 102 156ms 16 hours ago 335th CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 335th kasarino 0 104 4ms 44 hours ago 337th kg583 🇺🇸 0 106 38ms 9 May 2025 338th Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 338th AlephSquirrel 0 107 20ms 14 May 2025 340th CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 340th edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 340th albanian-laundromat 0 108 31ms 5 Jan 2026 340th albanian-laundromat 0 108 83ms 17 days ago 344th kg583 🇺🇸 0 109 43ms 24 days ago 344th GolfingSuccess 🇬🇷 0 109 46ms 23 days ago 344th edsrzf 🇳🇿 0 109 43ms 2 days ago 344th edsrzf 🇳🇿 0 109 35ms 30 hours ago 348th retrohun 0 111 41ms 3 days ago 349th GolfingSuccess 🇬🇷 0 112 44ms 24 Jan 2026 350th Shanethegamer 🇺🇸 0 114 1,281ms 9 May 2025 350th error256 0 114 513ms 29 Jan 2026 350th edsrzf 🇳🇿 0 114 489ms 39 hours ago 353rd emgordon154 0 115 80ms 8 hours ago 354th GolfingSuccess 🇬🇷 0 117 283ms 12 Jan 2026 354th albanian-laundromat 0 117 43ms 16 days ago 356th CaedenHarper 🇨🇦 0 120 274ms 2 days ago 356th emgordon154 0 120 65ms 2 days ago 358th Shanethegamer 🇺🇸 0 121 148ms 13 Dec 2024 358th elgan65536 🇺🇸 0 121 202ms 9 Feb 2026 360th albanian-laundromat 0 122 264ms 5 Jan 2026 361st stefangimmillaro 0 124 298ms 10 May 2025 361st Shanethegamer 🇺🇸 0 124 147ms 3 Jun 2025 363rd AstroOrbis 0 126 23ms 12 Aug 2025 363rd btjones0 0 126 168ms 2 days ago 365th madex 🇩🇪 0 129 366ms 7 hours ago 366th JDiLenarda 🇫🇷 0 131 1,330ms 2 days ago 367th HumanoidCPU 0 133 165ms 2 days ago 368th edsrzf 🇳🇿 0 136 4,806ms 19 May 2025 369th GolfingSuccess 🇬🇷 0 137 93ms 36 hours ago 370th Shanethegamer 🇺🇸 0 139 309ms 13 Dec 2024 370th UnderKoen 🇳🇱 0 139 1,178ms 2 days ago 372nd Shanethegamer 🇺🇸 0 146 31ms 9 May 2025 372nd canissimia 🇦🇶 0 146 15ms 10 hours ago 374th emgordon154 0 185 1,780ms 34 hours ago 375th albanian-laundromat 0 207 1,465ms 6 Jan 2026 376th albanian-laundromat 0 208 199ms 37 hours ago 377th emgordon154 0 235 1,545ms 17 hours ago 378th albanian-laundromat 0 265 68ms 8 Dec 2025 379th MeWhenI 🇻🇦 0 286 231ms 40 hours ago First Prev 321–379 of 379
