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?
brainfuck in Python 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 239th LostSyntax21 🇬🇧 366 287 25ms 19 Jan 2025 242nd bbakersmith 365 288 125ms 28 Jun 2022 243rd andrewgopher 363 289 27ms 25 Jun 2022 243rd galloj 🇨🇿 363 289 33ms 10 Jan 2023 243rd logvp 363 289 29ms 14 Mar 2025 246th PyryL 🇫🇮 362 290 22ms 20 Aug 2024 247th codingisgreatbutiamnot 361 291 237ms 12 Aug 2024 248th shelerr 357 294 13ms 15 Sep 2022 249th Bonjour27891 🇻🇳 356 295 288ms 15 Jul 2022 249th idoweinstein 356 295 39ms 30 Jul 2022 251st madex 🇩🇪 354 297 16ms 9 Jul 2024 252nd Andre3582 351 299 37ms 3 Nov 2020 252nd pengu1n-master 351 299 22ms 11 Dec 2021 252nd brimstonetrader 351 299 22ms 11 Jan 2024 255th muser-logiccpu 🇺🇦 350 300 22ms 21 Aug 2025 255th M4rc0g1 350 300 27ms 16 Nov 2025 257th FranklinJiaChen 349 301 34ms 4 Jul 2024 258th myleopard 347 303 27ms 15 Oct 2021 258th Heathcorp 🇦🇺 347 303 23ms 5 Dec 2022 258th BREMAUCY 🇫🇷 347 303 226ms 21 Jul 2025 258th yoikolover 347 303 19ms 11 Dec 2025 262nd nstearns96 🇬🇧 345 304 271ms 22 Jan 2023 262nd osNiko 🇧🇷 345 304 14ms 19 Aug 2025 264th DarkTemplar5 343 306 36ms 25 Feb 2020 264th knutae 🇳🇴 343 306 24ms 13 Nov 2021 266th LeeCamp 342 307 274ms 19 Feb 2022 266th namelessiw 342 307 15ms 15 Jan 2024 268th inverseLorentz 🇦🇺 341 308 19ms 14 May 2024 268th AtengChen 341 308 151ms 7 Sep 2024 268th AnnoyedArt1256 341 308 27ms 7 Jan 2025 271st johnathanleung18 340 309 398ms 3 Oct 2021 271st midnattssol 🇸🇪 340 309 26ms 19 Oct 2023 273rd andre-lameirinhas 🇵🇹 338 311 321ms 22 Jun 2020 273rd jacekwladzinski 338 311 15ms 8 Oct 2025 275th GeorgePerreault 337 312 18ms 6 Jun 2020 276th giacomogallina 334 314 497ms 4 Jan 2020 277th RandGuy 333 315 16ms 9 Nov 2022 277th hiichbindermax 333 315 17ms 3 Sep 2024 277th Alex-Huggett 🇬🇧 333 315 19ms 14 Sep 2025 280th hjcafaroUC 332 316 324ms 9 Aug 2020 281st karhuthebear 331 317 277ms 11 May 2022 281st CutSandstone 331 317 21ms 19 Jul 2024 281st qpwoeirut 331 317 16ms 16 Jul 2025 284th rollershutter 330 318 14ms 11 Oct 2022 285th 40fied4t 329 319 33ms 6 May 2025 286th rowboat1 323 325 18ms 14 Jun 2022 287th Supermac30 322 326 22ms 3 Jan 2023 288th bend-n 321 327 32ms 27 Jan 2024 289th adoxography 320 328 18ms 29 Apr 2024 290th ludwig-n 319 329 17ms 7 Apr 2021 291st richard-oelze 🇩🇪 318 330 335ms 7 May 2021 292nd zgialor-lab 317 331 385ms 1 Feb 2026 293rd Bodo171 316 332 146ms 6 Dec 2022 294th Deepztream 313 335 19ms 27 Aug 2018 294th zax2002 313 335 419ms 7 Sep 2020 294th OSYCh314 🇦🇺 313 335 336ms 23 Mar 2025 297th Stockoh 🇫🇷 313 336 28ms 1 May 2024 298th WillowWispy 310 339 12ms 22 Mar 2025 298th ComradeSquirrel 310 339 14ms 5 hours ago 300th TaserTheFox 🇺🇸 309 340 19ms 4 Apr 2023 301st TheZwierzLF 🇵🇱 307 342 20ms 22 Nov 2025 302nd SirFireball3521 303 346 21ms 26 Jan 2023 302nd wuduculfre 303 346 15ms 28 Jul 2025 304th idans320 303 347 16ms 31 Jul 2022 305th eshilo-draper 302 348 12ms 21 Oct 2022 305th Ythaenagor 302 348 12ms 5 Aug 2024 307th setop 300 350 15ms 19 Aug 2023 308th maggym00 299 351 18ms 14 Mar 2021 308th Wildst 299 351 15ms 23 Sep 2022 310th glesnick 297 353 14ms 17 Aug 2022 311th mdnestor 297 354 24ms 3 Jan 2023 312th vgamula 🇺🇦 296 355 15ms 16 Jul 2025 313th usnheckler 294 357 28ms 8 Jun 2019 314th geofft 292 359 18ms 11 Dec 2020 315th descentcare 292 360 16ms 8 Aug 2022 316th Jonson26 291 361 15ms 11 Feb 2026 317th kistlerf 🇨🇭 290 362 15ms 15 May 2025 318th jameswmccarty 289 363 23ms 11 Jul 2024 319th alangodfrey 288 365 19ms 18 Feb 2019 319th potato-jackson 288 365 22ms 5 Sep 2021 First Prev 241–320 of 381 Next Last
