The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 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 317th Natanaelel 🇸🇪 0 91 333ms 5 days ago 317th Steffan153 🇫🇮 0 91 59ms 3 days ago 323rd Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 323rd Yax42 🇫🇷 0 92 68ms 4 days ago 323rd edsrzf 🇳🇿 0 92 18ms 3 days ago 326th Yax42 🇫🇷 0 93 392ms 4 days ago 327th Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 327th edsrzf 🇳🇿 0 94 459ms 20 May 2025 327th MeWhenI 🇻🇦 0 94 396ms 3 days ago 327th edsrzf 🇳🇿 0 94 6ms 3 days ago 327th albanian-laundromat 0 94 6ms 3 days ago 327th madex 🇩🇪 0 94 99ms 20 hours ago 333rd albanian-laundromat 0 95 114ms 6 Jan 2026 334th Shanethegamer 🇺🇸 0 96 427ms 3 Jun 2025 334th CaedenHarper 🇨🇦 0 96 416ms 4 days ago 334th edsrzf 🇳🇿 0 96 32ms 4 days ago 334th kumavale 0 96 160ms 3 days ago 338th albanian-laundromat 0 97 44ms 6 Dec 2025 338th tomh1012 0 97 396ms 5 days ago 340th error256 0 98 155ms 16 Jan 2026 340th albanian-laundromat 0 98 135ms 23 Feb 2026 340th edsrzf 🇳🇿 0 98 157ms 3 days ago 343rd Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 343rd madex 🇩🇪 0 99 19ms 20 hours ago 345th edsrzf 🇳🇿 0 100 145ms 9 May 2025 345th emgordon154 0 100 7ms 9 May 2025 345th JOrE20 0 100 42ms 15 Dec 2025 345th madex 🇩🇪 0 100 113ms 20 hours ago 345th h3ra993huskp 🇯🇵 0 100 392ms 11 hours ago 350th rucin93 🇵🇱 0 101 373ms 24 days ago 350th madex 🇩🇪 0 101 141ms 21 hours ago 352nd fantaize 0 102 150ms 18 days ago 352nd emgordon154 0 102 4ms 4 days ago 352nd madex 🇩🇪 0 102 156ms 2 days ago 355th Jacob385 0 103 386ms 21 hours ago 356th CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 356th kasarino 0 104 4ms 3 days ago 358th kg583 🇺🇸 0 106 38ms 9 May 2025 359th Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 359th AlephSquirrel 0 107 20ms 14 May 2025 361st CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 361st edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 361st albanian-laundromat 0 108 31ms 5 Jan 2026 361st albanian-laundromat 0 108 83ms 20 days ago 365th kg583 🇺🇸 0 109 43ms 26 days ago 365th GolfingSuccess 🇬🇷 0 109 46ms 25 days ago 365th edsrzf 🇳🇿 0 109 43ms 4 days ago 365th edsrzf 🇳🇿 0 109 35ms 3 days ago 369th retrohun 0 111 41ms 5 days ago 370th GolfingSuccess 🇬🇷 0 112 44ms 24 Jan 2026 371st Shanethegamer 🇺🇸 0 114 1,281ms 9 May 2025 371st error256 0 114 513ms 29 Jan 2026 371st edsrzf 🇳🇿 0 114 489ms 3 days ago 374th emgordon154 0 115 80ms 2 days ago 375th GolfingSuccess 🇬🇷 0 117 283ms 12 Jan 2026 375th albanian-laundromat 0 117 43ms 18 days ago 377th MeWhenI 🇻🇦 0 118 281ms 39 hours ago 378th madex 🇩🇪 0 119 1,373ms 20 hours ago 379th CaedenHarper 🇨🇦 0 120 274ms 4 days ago 379th emgordon154 0 120 65ms 4 days ago 381st Shanethegamer 🇺🇸 0 121 148ms 13 Dec 2024 381st elgan65536 🇺🇸 0 121 202ms 9 Feb 2026 381st madex 🇩🇪 0 121 8ms 20 hours ago 384th albanian-laundromat 0 122 264ms 5 Jan 2026 385th stefangimmillaro 0 124 298ms 10 May 2025 385th Shanethegamer 🇺🇸 0 124 147ms 3 Jun 2025 385th madex 🇩🇪 0 124 272ms 20 hours ago 388th AstroOrbis 0 126 23ms 12 Aug 2025 388th btjones0 0 126 168ms 4 days ago 390th madex 🇩🇪 0 129 366ms 2 days ago 391st JDiLenarda 🇫🇷 0 131 1,330ms 4 days ago 392nd HumanoidCPU 0 133 165ms 4 days ago 393rd edsrzf 🇳🇿 0 136 4,806ms 19 May 2025 394th GolfingSuccess 🇬🇷 0 137 93ms 3 days ago 395th Shanethegamer 🇺🇸 0 139 309ms 13 Dec 2024 395th UnderKoen 🇳🇱 0 139 1,178ms 4 days ago 397th canissimia 🇦🇶 0 145 14ms 46 hours ago 398th Shanethegamer 🇺🇸 0 146 31ms 9 May 2025 399th madex 🇩🇪 0 170 36ms 20 hours ago 400th emgordon154 0 185 1,780ms 3 days ago First Prev 321–400 of 405 Next Last