The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 28 hours. 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 sean-niemann 🇺🇸 0 87 42ms 9 May 2025 321st CaedenHarper 🇨🇦 0 87 439ms 5 days ago 321st madex 🇩🇪 0 87 13ms 3 days ago 324th muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 324th albanian-laundromat 0 88 1,372ms 5 Jan 2026 324th error256 0 88 3,067ms 14 Jan 2026 324th IanUtley 0 88 2,941ms 16 Jan 2026 328th Shanethegamer 🇺🇸 0 89 107ms 13 Dec 2024 328th GolfingSuccess 🇬🇷 0 89 64ms 12 Jan 2026 330th sean-niemann 🇺🇸 0 90 7ms 10 May 2025 330th dokutan 0 90 65ms 8 Feb 2026 332nd ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 332nd error256 0 91 62ms 12 Jan 2026 332nd error256 0 91 293ms 14 Jan 2026 332nd GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 332nd Natanaelel 🇸🇪 0 91 333ms 6 days ago 332nd Steffan153 🇫🇮 0 91 57ms 4 days ago 338th Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 338th Yax42 🇫🇷 0 92 68ms 6 days ago 338th edsrzf 🇳🇿 0 92 18ms 4 days ago 341st Yax42 🇫🇷 0 93 392ms 6 days ago 342nd Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 342nd edsrzf 🇳🇿 0 94 459ms 20 May 2025 342nd MeWhenI 🇻🇦 0 94 396ms 5 days ago 342nd edsrzf 🇳🇿 0 94 6ms 4 days ago 342nd albanian-laundromat 0 94 6ms 4 days ago 342nd madex 🇩🇪 0 94 99ms 2 days ago 342nd sean-niemann 🇺🇸 0 94 6ms 9 hours ago 349th albanian-laundromat 0 95 114ms 6 Jan 2026 350th Shanethegamer 🇺🇸 0 96 427ms 3 Jun 2025 350th CaedenHarper 🇨🇦 0 96 416ms 5 days ago 350th edsrzf 🇳🇿 0 96 32ms 5 days ago 350th kumavale 0 96 160ms 4 days ago 350th Steffan153 🇫🇮 0 96 30ms 15 hours ago 355th albanian-laundromat 0 97 44ms 6 Dec 2025 355th tomh1012 0 97 396ms 6 days ago 357th error256 0 98 155ms 16 Jan 2026 357th albanian-laundromat 0 98 135ms 23 Feb 2026 357th edsrzf 🇳🇿 0 98 157ms 4 days ago 357th michelebastione 🇮🇹 0 98 454ms 2 hours ago 361st Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 361st madex 🇩🇪 0 99 19ms 2 days ago 363rd edsrzf 🇳🇿 0 100 145ms 9 May 2025 363rd JOrE20 0 100 42ms 15 Dec 2025 363rd madex 🇩🇪 0 100 113ms 2 days ago 363rd h3ra993huskp 🇯🇵 0 100 392ms 39 hours ago 367th rucin93 🇵🇱 0 101 373ms 25 days ago 367th madex 🇩🇪 0 101 141ms 2 days ago 369th fantaize 0 102 150ms 20 days ago 369th emgordon154 0 102 4ms 5 days ago 369th madex 🇩🇪 0 102 156ms 3 days ago 372nd Jacob385 0 103 386ms 2 days ago 373rd CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 373rd kasarino 0 104 4ms 5 days ago 375th kg583 🇺🇸 0 106 38ms 9 May 2025 376th Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 376th AlephSquirrel 0 107 20ms 14 May 2025 378th CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 378th edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 378th albanian-laundromat 0 108 31ms 5 Jan 2026 378th albanian-laundromat 0 108 83ms 21 days ago 382nd kg583 🇺🇸 0 109 43ms 27 days ago 382nd GolfingSuccess 🇬🇷 0 109 46ms 27 days ago 382nd edsrzf 🇳🇿 0 109 43ms 5 days ago 382nd edsrzf 🇳🇿 0 109 35ms 4 days ago 386th retrohun 0 111 41ms 6 days ago 387th GolfingSuccess 🇬🇷 0 112 44ms 24 Jan 2026 388th Shanethegamer 🇺🇸 0 114 1,281ms 9 May 2025 388th error256 0 114 513ms 29 Jan 2026 388th edsrzf 🇳🇿 0 114 489ms 4 days ago 391st emgordon154 0 115 80ms 3 days ago 392nd GolfingSuccess 🇬🇷 0 117 283ms 12 Jan 2026 392nd albanian-laundromat 0 117 43ms 19 days ago 392nd elgan65536 🇺🇸 0 117 156ms 21 hours ago 395th MeWhenI 🇻🇦 0 118 281ms 2 days ago 396th madex 🇩🇪 0 119 1,373ms 2 days ago 397th CaedenHarper 🇨🇦 0 120 274ms 5 days ago 397th emgordon154 0 120 65ms 5 days ago 397th HumanoidCPU 0 120 401ms 9 hours ago 400th Shanethegamer 🇺🇸 0 121 148ms 13 Dec 2024 First Prev 321–400 of 423 Next Last