The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 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 edsrzf 🇳🇿 0 94 6ms 2 days ago 318th albanian-laundromat 0 94 6ms 2 days ago 323rd albanian-laundromat 0 95 114ms 6 Jan 2026 324th Shanethegamer 🇺🇸 0 96 427ms 3 Jun 2025 324th CaedenHarper 🇨🇦 0 96 416ms 3 days ago 324th edsrzf 🇳🇿 0 96 32ms 3 days ago 324th kumavale 0 96 160ms 2 days ago 328th albanian-laundromat 0 97 44ms 6 Dec 2025 328th tomh1012 0 97 396ms 3 days ago 330th error256 0 98 155ms 16 Jan 2026 330th albanian-laundromat 0 98 135ms 23 Feb 2026 330th edsrzf 🇳🇿 0 98 157ms 2 days ago 333rd Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 334th edsrzf 🇳🇿 0 100 145ms 9 May 2025 334th emgordon154 0 100 7ms 9 May 2025 334th JOrE20 0 100 42ms 15 Dec 2025 337th rucin93 🇵🇱 0 101 373ms 23 days ago 338th fantaize 0 102 150ms 17 days ago 338th emgordon154 0 102 4ms 3 days ago 338th madex 🇩🇪 0 102 156ms 36 hours ago 341st CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 341st kasarino 0 104 4ms 2 days ago 343rd kg583 🇺🇸 0 106 38ms 9 May 2025 344th Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 344th AlephSquirrel 0 107 20ms 14 May 2025 346th CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 346th edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 346th albanian-laundromat 0 108 31ms 5 Jan 2026 346th albanian-laundromat 0 108 83ms 18 days ago 350th kg583 🇺🇸 0 109 43ms 25 days ago 350th GolfingSuccess 🇬🇷 0 109 46ms 24 days ago 350th edsrzf 🇳🇿 0 109 43ms 3 days ago 350th edsrzf 🇳🇿 0 109 35ms 2 days ago 354th retrohun 0 111 41ms 3 days ago 355th GolfingSuccess 🇬🇷 0 112 44ms 24 Jan 2026 356th Shanethegamer 🇺🇸 0 114 1,281ms 9 May 2025 356th error256 0 114 513ms 29 Jan 2026 356th edsrzf 🇳🇿 0 114 489ms 2 days ago 359th emgordon154 0 115 80ms 28 hours ago 360th GolfingSuccess 🇬🇷 0 117 283ms 12 Jan 2026 360th albanian-laundromat 0 117 43ms 17 days ago 362nd MeWhenI 🇻🇦 0 118 281ms 10 hours ago 363rd CaedenHarper 🇨🇦 0 120 274ms 3 days ago 363rd emgordon154 0 120 65ms 3 days ago 365th Shanethegamer 🇺🇸 0 121 148ms 13 Dec 2024 365th elgan65536 🇺🇸 0 121 202ms 9 Feb 2026 367th albanian-laundromat 0 122 264ms 5 Jan 2026 368th stefangimmillaro 0 124 298ms 10 May 2025 368th Shanethegamer 🇺🇸 0 124 147ms 3 Jun 2025 370th AstroOrbis 0 126 23ms 12 Aug 2025 370th btjones0 0 126 168ms 3 days ago 372nd madex 🇩🇪 0 129 366ms 27 hours ago 373rd JDiLenarda 🇫🇷 0 131 1,330ms 2 days ago 374th HumanoidCPU 0 133 165ms 3 days ago 375th edsrzf 🇳🇿 0 136 4,806ms 19 May 2025 376th GolfingSuccess 🇬🇷 0 137 93ms 2 days ago 377th Shanethegamer 🇺🇸 0 139 309ms 13 Dec 2024 377th UnderKoen 🇳🇱 0 139 1,178ms 2 days ago 379th canissimia 🇦🇶 0 145 14ms 17 hours ago 380th Shanethegamer 🇺🇸 0 146 31ms 9 May 2025 381st emgordon154 0 185 1,780ms 2 days ago 382nd albanian-laundromat 0 192 201ms 15 hours ago 383rd albanian-laundromat 0 207 1,465ms 6 Jan 2026 384th emgordon154 0 235 1,545ms 37 hours ago 385th albanian-laundromat 0 265 68ms 8 Dec 2025 386th MeWhenI 🇻🇦 0 286 231ms 2 days ago First Prev 321–386 of 386
