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 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 156th error256 0 69 410ms 3 days ago 156th edsrzf 🇳🇿 0 69 394ms 36 hours ago 163rd btnlq 0 70 193ms 4 Dec 2024 163rd error256 0 70 129ms 15 Jan 2026 163rd error256 0 70 18ms 13 days ago 163rd Seek64 🇩🇪 0 70 116ms 2 days ago 163rd DialFrost 🇸🇬 0 70 116ms 3 hours ago 168th GolfingSuccess 🇬🇷 0 71 3ms 12 Jan 2026 168th GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 168th GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 168th ovs-code 🇩🇪 0 71 134ms 2 days ago 168th edsrzf 🇳🇿 0 71 18ms 41 hours ago 168th kg583 🇺🇸 0 71 18ms 40 hours ago 168th rhdqor213 0 71 4ms 35 hours ago 168th ovs-code 🇩🇪 0 71 129ms 2 hours ago 176th dokutan 0 72 525ms 15 Aug 2025 176th rucin93 🇵🇱 0 72 9ms 19 days ago 176th aksyristos 0 72 247ms 14 days ago 176th blaztoma 🇱🇹 0 72 123ms 2 days ago 176th Emutis 🇱🇹 0 72 121ms 2 days ago 176th KasperKivimaeki 🇫🇮 0 72 4ms 47 hours ago 176th edsrzf 🇳🇿 0 72 9ms 34 hours ago 176th zacjl 0 72 131ms 15 hours ago 176th Steffan153 🇫🇮 0 72 4ms 4 hours ago 185th IISResetMe 0 73 310ms 10 Jan 2026 185th pardouin 🇫🇷 0 73 179ms 14 Feb 2026 185th Steffan153 🇫🇮 0 73 166ms 19 Feb 2026 188th saito-ta 🇯🇵 0 74 3ms 11 May 2025 188th error256 0 74 3ms 12 Jan 2026 188th lukegustafson 🇺🇸 0 74 189ms 17 days ago 188th albanian-laundromat 0 74 9ms 9 days ago 192nd kg583 🇺🇸 0 75 38ms 1 Dec 2024 192nd hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 192nd Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 192nd Natanaelel 🇸🇪 0 75 19ms 11 May 2025 192nd commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 192nd albanian-laundromat 0 75 108ms 5 Jan 2026 192nd albanian-laundromat 0 75 455ms 6 Jan 2026 192nd GolfingSuccess 🇬🇷 0 75 19ms 11 Jan 2026 192nd albanian-laundromat 0 75 238ms 23 days ago 192nd madex 🇩🇪 0 75 18ms 7 days ago 192nd CaedenHarper 🇨🇦 0 75 149ms 4 days ago 192nd fuzzylojik-golf 🇺🇸 0 75 123ms 2 days ago 192nd Yax42 🇫🇷 0 75 4ms 2 days ago 192nd edsrzf 🇳🇿 0 75 17ms 34 hours ago 192nd plcc0 0 75 22ms 28 hours ago 192nd zgialor-lab 0 75 25ms 26 hours ago 192nd ndren 0 75 19ms 46 mins ago 209th Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 209th ovs-code 🇩🇪 0 76 3ms 10 May 2025 209th AlephSquirrel 0 76 43ms 3 Dec 2025 209th AlephSquirrel 0 76 445ms 3 Dec 2025 209th albanian-laundromat 0 76 18ms 23 days ago 209th albanian-laundromat 0 76 188ms 17 days ago 209th MeWhenI 🇻🇦 0 76 586ms 10 days ago 209th MeWhenI 🇻🇦 0 76 184ms 20 hours ago 209th duckyluuk 🇳🇱 0 76 128ms 3 hours ago 218th CornerMercury 🇬🇧 0 77 18ms 3 Dec 2024 218th lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 218th Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 218th DialFrost 🇸🇬 0 77 18ms 8 May 2025 218th emgordon154 0 77 161ms 9 May 2025 218th Natanaelel 🇸🇪 0 77 3ms 11 May 2025 218th addmai 0 77 20ms 24 Jul 2025 218th hiichbindermax 0 77 19ms 17 Aug 2025 218th 5cw 🇺🇸 0 77 18ms 22 Aug 2025 218th davecame 0 77 135ms 25 Sep 2025 218th SirBogman 🇺🇸 0 77 240ms 13 Oct 2025 218th jtaxen 0 77 19ms 16 Oct 2025 218th albanian-laundromat 0 77 19ms 25 Nov 2025 218th albanian-laundromat 0 77 412ms 6 Dec 2025 218th anter69 🇭🇺 0 77 139ms 4 Feb 2026 218th Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 218th KasperKivimaeki 🇫🇮 0 77 564ms 10 days ago 218th StefanHabel 🇨🇦 0 77 1,217ms 2 days ago 218th ahmetdemirag 🇨🇾 0 77 18ms 2 days ago 218th tomh1012 0 77 17ms 2 days ago 218th HumanoidCPU 0 77 230ms 43 hours ago 218th qpwoeirut 0 77 20ms 39 hours ago 218th btjones0 0 77 19ms 36 hours ago First Prev 161–240 of 363 Next Last