The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
Gray Code Encoder 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 319th error256 0 85 18ms 10 May 2025 319th GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 319th HumanoidCPU 0 85 434ms 6 hours ago 324th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 324th kg583 🇺🇸 0 86 39ms 16 Feb 2025 324th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 324th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 324th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 324th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 324th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 324th elgan65536 🇺🇸 0 86 168ms 25 days ago 324th CaedenHarper 🇨🇦 0 86 399ms 4 days ago 324th CaedenHarper 🇨🇦 0 86 153ms 3 days ago 324th edsrzf 🇳🇿 0 86 414ms 29 hours ago 324th emgordon154 0 86 406ms 15 hours ago 324th GolfingSuccess 🇬🇷 0 86 19ms 8 hours ago 337th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 337th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 337th albanian-laundromat 0 87 1,424ms 4 days ago 337th Yax42 🇫🇷 0 87 2,430ms 38 hours ago 341st kg583 🇺🇸 0 88 23ms 12 Feb 2026 341st fuzzylojik-golf 🇺🇸 0 88 152ms 2 days ago 343rd Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 343rd Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 343rd DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 343rd CaedenHarper 🇨🇦 0 89 103ms 3 days ago 347th Yax42 🇫🇷 0 90 13ms 38 hours ago 348th GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 349th namelessiw 0 92 504ms 10 Oct 2025 349th fuzzylojik-golf 🇺🇸 0 92 383ms 2 days ago 349th madex 🇩🇪 0 92 12ms 33 hours ago 352nd CaedenHarper 🇨🇦 0 93 13ms 4 days ago 353rd DialFrost 🇸🇬 0 94 13ms 10 May 2025 353rd edsrzf 🇳🇿 0 94 187ms 17 May 2025 353rd edsrzf 🇳🇿 0 94 21ms 12 hours ago 356th Yax42 🇫🇷 0 95 389ms 38 hours ago 357th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 357th HumanoidCPU 0 96 160ms 31 hours ago 359th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 360th snydej 0 99 43ms 22 Nov 2024 360th albanian-laundromat 0 99 343ms 4 days ago 360th dokutan 0 99 409ms 20 hours ago 363rd dokutan 0 100 19ms 20 hours ago 364th HumanoidCPU 0 101 361ms 9 hours ago 364th HumanoidCPU 0 101 382ms 7 hours ago 366th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 366th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 366th edsrzf 🇳🇿 0 102 295ms 9 May 2025 366th GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 366th ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 366th CaedenHarper 🇨🇦 0 102 301ms 4 days ago 366th fuzzylojik-golf 🇺🇸 0 102 292ms 2 days ago 366th emgordon154 0 102 274ms 26 hours ago 374th lukechampine 0 103 301ms 7 Jun 2025 374th chris124567 0 103 294ms 8 Jun 2025 374th albanian-laundromat 0 103 270ms 16 Dec 2025 374th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 374th HumanoidCPU 0 103 329ms 7 hours ago 379th UnderKoen 🇳🇱 0 107 2,121ms 19 hours ago 380th edsrzf 🇳🇿 0 109 21ms 79 mins ago 381st kg583 🇺🇸 0 110 14ms 12 Jan 2026 382nd GolfingSuccess 🇬🇷 0 111 107ms 5 hours ago 383rd retrohun 0 112 16ms 42 hours ago 383rd edsrzf 🇳🇿 0 112 27ms 3 hours ago 385th edsrzf 🇳🇿 0 114 30ms 12 hours ago 386th prestosilver 🇺🇸 0 115 418ms 40 hours ago 386th HumanoidCPU 0 115 260ms 6 hours ago 388th emgordon154 0 116 66ms 3 hours ago 389th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 390th HumanoidCPU 0 118 14ms 114 mins ago 391st emgordon154 0 119 56ms 27 hours ago 391st not-a-pokemon 0 119 15ms 16 hours ago 393rd edsrzf 🇳🇿 0 127 58ms 21 hours ago 394th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 395th CaedenHarper 🇨🇦 0 129 446ms 4 days ago 396th Natanaelel 🇸🇪 0 130 360ms 2 May 2025 397th edsrzf 🇳🇿 0 134 22ms 6 hours ago 398th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 399th albanian-laundromat 0 137 27ms 4 days ago 400th GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 First Prev 321–400 of 417 Next Last