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 chars. 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 Chars Time Submitted 320th tomh1012 0 97 396ms 3 days ago 322nd error256 0 98 155ms 16 Jan 2026 322nd albanian-laundromat 0 98 135ms 23 Feb 2026 322nd edsrzf 🇳🇿 0 98 157ms 36 hours ago 325th Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 326th edsrzf 🇳🇿 0 100 145ms 9 May 2025 326th emgordon154 0 100 7ms 9 May 2025 326th JOrE20 0 100 42ms 15 Dec 2025 329th rucin93 🇵🇱 0 101 373ms 22 days ago 330th fantaize 0 102 150ms 16 days ago 330th emgordon154 0 102 4ms 2 days ago 330th madex 🇩🇪 0 102 156ms 15 hours ago 333rd CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 333rd kasarino 0 104 4ms 44 hours ago 335th kg583 🇺🇸 0 106 38ms 9 May 2025 336th Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 336th AlephSquirrel 0 107 20ms 14 May 2025 338th CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 338th edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 338th albanian-laundromat 0 108 31ms 5 Jan 2026 338th albanian-laundromat 0 108 83ms 17 days ago 342nd kg583 🇺🇸 0 109 43ms 24 days ago 342nd GolfingSuccess 🇬🇷 0 109 46ms 23 days ago 342nd edsrzf 🇳🇿 0 109 43ms 2 days ago 342nd edsrzf 🇳🇿 0 109 35ms 30 hours ago 346th retrohun 0 111 41ms 3 days ago 347th GolfingSuccess 🇬🇷 0 112 44ms 24 Jan 2026 348th Shanethegamer 🇺🇸 0 114 1,281ms 9 May 2025 348th error256 0 114 513ms 29 Jan 2026 348th edsrzf 🇳🇿 0 114 489ms 39 hours ago 351st emgordon154 0 115 80ms 8 hours ago 352nd GolfingSuccess 🇬🇷 0 117 283ms 12 Jan 2026 352nd albanian-laundromat 0 117 43ms 16 days ago 354th CaedenHarper 🇨🇦 0 120 274ms 2 days ago 354th emgordon154 0 120 65ms 2 days ago 356th Shanethegamer 🇺🇸 0 121 148ms 13 Dec 2024 356th elgan65536 🇺🇸 0 121 202ms 9 Feb 2026 358th albanian-laundromat 0 122 264ms 5 Jan 2026 359th stefangimmillaro 0 124 298ms 10 May 2025 359th Shanethegamer 🇺🇸 0 124 147ms 3 Jun 2025 361st AstroOrbis 0 126 23ms 12 Aug 2025 361st btjones0 0 126 168ms 2 days ago 363rd madex 🇩🇪 0 129 366ms 6 hours ago 364th JDiLenarda 🇫🇷 0 131 1,330ms 2 days ago 365th HumanoidCPU 0 133 165ms 2 days ago 366th edsrzf 🇳🇿 0 136 4,806ms 19 May 2025 367th GolfingSuccess 🇬🇷 0 137 93ms 35 hours ago 368th Shanethegamer 🇺🇸 0 139 309ms 13 Dec 2024 368th UnderKoen 🇳🇱 0 139 1,178ms 2 days ago 370th Shanethegamer 🇺🇸 0 146 31ms 9 May 2025 370th canissimia 🇦🇶 0 146 15ms 10 hours ago 372nd emgordon154 0 185 1,780ms 33 hours ago 373rd albanian-laundromat 0 207 1,465ms 6 Jan 2026 374th albanian-laundromat 0 208 199ms 37 hours ago 375th emgordon154 0 235 1,545ms 17 hours ago 376th albanian-laundromat 0 265 68ms 8 Dec 2025 377th MeWhenI 🇻🇦 0 286 231ms 39 hours ago First Prev 321–377 of 377