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?
DFA Simulator in Python 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 80th thienudomsrirungruang 697 211 11ms 1 Apr 2024 82nd YAJUE114514 690 213 10ms 10 Dec 2025 83rd VictorFordham 684 215 13ms 24 Nov 2023 84th keelimeguy 🇺🇸 677 217 56ms 16 Nov 2023 85th CaedenHarper 🇨🇦 674 218 18ms 21 Sep 2025 86th amollberg 🇸🇪 668 220 12ms 14 Jan 2024 87th jtaxen 639 230 12ms 8 Jun 2024 87th luuumine 🇫🇷 639 230 11ms 29 Oct 2025 89th alemelis 628 234 32ms 11 Oct 2024 90th croc54 623 236 11ms 17 Dec 2024 91st yuchuehw 620 237 11ms 15 May 2024 92nd fgrosshans 🇫🇷 615 239 13ms 7 Nov 2023 93rd jameswmccarty 613 240 12ms 24 Feb 2025 93rd Heathcorp 🇦🇺 613 240 11ms 12 Aug 2025 95th adoxography 610 241 12ms 19 Nov 2023 96th wh3n3v3r 🇨🇿 600 245 12ms 11 Nov 2024 97th tomh1012 598 246 12ms 25 days ago 98th neihousaigaai 595 247 12ms 7 Oct 2024 99th JunkIce 590 249 11ms 9 Mar 2025 100th galloj 🇨🇿 579 254 11ms 24 Nov 2023 100th MaxElf999 579 254 13ms 9 Feb 2024 102nd FlorianCassayre 🇫🇷 565 260 11ms 3 Nov 2023 103rd logvp 563 261 12ms 6 Oct 2024 104th za3k 561 262 12ms 22 Jul 2025 105th BREMAUCY 🇫🇷 544 270 13ms 21 Aug 2025 106th FortuiteMan 🇫🇷 540 272 13ms 14 Oct 2024 107th alexjurkiewicz 🇦🇺 535 275 12ms 14 Nov 2023 108th FranklinJiaChen 529 278 13ms 4 Jul 2024 109th dokutan 519 283 13ms 5 Jul 2024 110th TheZwierzLF 🇵🇱 514 286 32ms 5 Jan 2026 111th jelleromer 507 290 25ms 19 Nov 2023 112th nemoyatpeace 495 297 21ms 29 Dec 2025 112th Lv0Sys 🇵🇱 495 297 12ms 24 Feb 2026 114th msbranicky 493 298 12ms 1 Nov 2023 115th mbittner20 492 299 11ms 12 Feb 2024 116th Yewzir 🇧🇪 482 305 12ms 9 Dec 2025 117th haighd 480 306 12ms 21 Nov 2023 118th madex 🇩🇪 474 310 12ms 8 Oct 2025 119th RZ781 436 337 12ms 19 Nov 2023 120th Babafaba 432 340 13ms 17 Nov 2025 121st AstroOrbis 425 346 12ms 12 days ago 122nd jensdewaard 395 372 15ms 19 Nov 2023 123rd DialFrost 🇸🇬 366 402 14ms 1 Nov 2023 124th muser-logiccpu 🇺🇦 291 506 12ms 5 Aug 2025 125th Zhenyu-Bo 253 581 12ms 31 Jul 2025 126th kevinnaviapaiva 248 593 12ms 26 Feb 2025 127th zt14427 225 654 14ms 11 Feb 2025 128th AidanWalter 60 2,447 13ms 8 Feb 2025 First Prev 81–128 of 128
