The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 41 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 318th IanUtley 0 88 2,941ms 16 Jan 2026 322nd Shanethegamer 🇺🇸 0 89 107ms 13 Dec 2024 322nd GolfingSuccess 🇬🇷 0 89 64ms 12 Jan 2026 324th sean-niemann 🇺🇸 0 90 7ms 10 May 2025 324th dokutan 0 90 65ms 8 Feb 2026 326th ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 326th error256 0 91 62ms 12 Jan 2026 326th error256 0 91 293ms 14 Jan 2026 326th GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 326th Natanaelel 🇸🇪 0 91 333ms 5 days ago 326th Steffan153 🇫🇮 0 91 57ms 3 days ago 332nd Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 332nd Yax42 🇫🇷 0 92 68ms 5 days ago 332nd edsrzf 🇳🇿 0 92 18ms 3 days ago 335th Yax42 🇫🇷 0 93 392ms 5 days ago 336th Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 336th edsrzf 🇳🇿 0 94 459ms 20 May 2025 336th MeWhenI 🇻🇦 0 94 396ms 4 days ago 336th edsrzf 🇳🇿 0 94 6ms 4 days ago 336th albanian-laundromat 0 94 6ms 4 days ago 336th madex 🇩🇪 0 94 99ms 35 hours ago 342nd albanian-laundromat 0 95 114ms 6 Jan 2026 343rd Shanethegamer 🇺🇸 0 96 427ms 3 Jun 2025 343rd CaedenHarper 🇨🇦 0 96 416ms 5 days ago 343rd edsrzf 🇳🇿 0 96 32ms 5 days ago 343rd kumavale 0 96 160ms 4 days ago 343rd Steffan153 🇫🇮 0 96 30ms 2 hours ago 348th albanian-laundromat 0 97 44ms 6 Dec 2025 348th tomh1012 0 97 396ms 5 days ago 350th error256 0 98 155ms 16 Jan 2026 350th albanian-laundromat 0 98 135ms 23 Feb 2026 350th edsrzf 🇳🇿 0 98 157ms 4 days ago 353rd Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 353rd madex 🇩🇪 0 99 19ms 35 hours ago 355th edsrzf 🇳🇿 0 100 145ms 9 May 2025 355th JOrE20 0 100 42ms 15 Dec 2025 355th madex 🇩🇪 0 100 113ms 35 hours ago 355th h3ra993huskp 🇯🇵 0 100 392ms 26 hours ago 359th rucin93 🇵🇱 0 101 373ms 24 days ago 359th madex 🇩🇪 0 101 141ms 36 hours ago 361st fantaize 0 102 150ms 19 days ago 361st emgordon154 0 102 4ms 5 days ago 361st madex 🇩🇪 0 102 156ms 3 days ago 364th Jacob385 0 103 386ms 36 hours ago 365th CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 365th kasarino 0 104 4ms 4 days ago 367th kg583 🇺🇸 0 106 38ms 9 May 2025 368th Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 368th AlephSquirrel 0 107 20ms 14 May 2025 370th CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 370th edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 370th albanian-laundromat 0 108 31ms 5 Jan 2026 370th albanian-laundromat 0 108 83ms 20 days ago 374th kg583 🇺🇸 0 109 43ms 27 days ago 374th GolfingSuccess 🇬🇷 0 109 46ms 26 days ago 374th edsrzf 🇳🇿 0 109 43ms 5 days ago 374th edsrzf 🇳🇿 0 109 35ms 3 days ago 378th retrohun 0 111 41ms 5 days ago 379th GolfingSuccess 🇬🇷 0 112 44ms 24 Jan 2026 380th Shanethegamer 🇺🇸 0 114 1,281ms 9 May 2025 380th error256 0 114 513ms 29 Jan 2026 380th edsrzf 🇳🇿 0 114 489ms 4 days ago 383rd emgordon154 0 115 80ms 3 days ago 384th GolfingSuccess 🇬🇷 0 117 283ms 12 Jan 2026 384th albanian-laundromat 0 117 43ms 19 days ago 384th elgan65536 🇺🇸 0 117 156ms 8 hours ago 387th MeWhenI 🇻🇦 0 118 281ms 2 days ago 388th madex 🇩🇪 0 119 1,373ms 35 hours ago 389th CaedenHarper 🇨🇦 0 120 274ms 5 days ago 389th emgordon154 0 120 65ms 5 days ago 391st Shanethegamer 🇺🇸 0 121 148ms 13 Dec 2024 391st madex 🇩🇪 0 121 8ms 35 hours ago 393rd albanian-laundromat 0 122 264ms 5 Jan 2026 394th stefangimmillaro 0 124 298ms 10 May 2025 394th Shanethegamer 🇺🇸 0 124 147ms 3 Jun 2025 394th madex 🇩🇪 0 124 272ms 35 hours ago 397th AstroOrbis 0 126 23ms 12 Aug 2025 397th btjones0 0 126 168ms 5 days ago 399th madex 🇩🇪 0 129 366ms 2 days ago 400th JDiLenarda 🇫🇷 0 131 1,330ms 4 days ago First Prev 321–400 of 415 Next Last