The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. Why not try and solve them ahead of time?
Repeating Decimals 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 79th Sp3000 🇦🇺 404 198 11ms 20 Nov 2023 82nd Alex-x90 🇺🇸 400 200 11ms 1 Feb 2023 82nd ahmetdemirag 🇨🇾 400 200 11ms 15 Dec 2024 82nd StefanHabel 🇨🇦 400 200 10ms 21 days ago 85th happppya 398 201 10ms 12 days ago 85th zgialor-lab 398 201 11ms 4 days ago 87th AlephSquirrel 396 202 18ms 1 Feb 2023 88th jared-hughes 394 203 10ms 17 Feb 2023 88th neihousaigaai 394 203 10ms 13 Feb 2024 88th snydej 394 203 11ms 21 Nov 2024 91st solisolu 388 206 10ms 21 days ago 92nd OllieBoyne 🇬🇧 385 208 10ms 4 Feb 2023 93rd klixel 🇨🇦 381 210 11ms 18 Jul 2025 93rd InigoK 🇺🇸 381 210 18ms 6 Sep 2025 93rd Matter1024 🇮🇳 381 210 10ms 16 Jan 2026 96th codewrite 🇬🇧 379 211 10ms 27 Jun 2025 97th knutae 🇳🇴 377 212 18ms 13 Nov 2023 98th sciencejiho 376 213 10ms 11 Feb 2025 99th CutSandstone 374 214 11ms 7 Jul 2024 99th croc54 374 214 11ms 30 Jan 2025 101st inverseLorentz 🇦🇺 372 215 11ms 19 Oct 2023 102nd guilhem-roy 🇫🇷 370 216 11ms 6 Feb 2023 103rd BREMAUCY 🇫🇷 369 217 11ms 19 Mar 2024 104th galloj 🇨🇿 360 222 11ms 1 Feb 2023 104th TobyBoyne 🇬🇧 360 222 12ms 2 Feb 2023 104th Bulmenisaurus 360 222 11ms 8 Sep 2025 107th aksyristos 359 223 11ms 6 Feb 2023 107th Lv0Sys 🇵🇱 359 223 11ms 25 Feb 2026 109th trist224 🇫🇷 349 229 11ms 12 Aug 2024 109th Program-Pi 349 229 17ms 9 days ago 111th suwat513 348 230 10ms 16 Jun 2023 112th msbranicky 340 235 21ms 27 Aug 2023 113th wuduculfre 329 243 12ms 22 Jul 2025 114th RDShah 327 245 13ms 3 Feb 2023 115th qwjhvbxi 325 246 11ms 24 Feb 2024 116th retrohun 324 247 10ms 11 Mar 2023 116th AtengChen 324 247 9ms 8 Aug 2024 118th CedricGebistorf 319 251 11ms 5 May 2023 119th fgrosshans 🇫🇷 315 254 10ms 5 May 2023 120th celiendonze 🇨🇭 313 256 10ms 25 May 2023 120th nooberitess 313 256 11ms 8 Apr 2025 122nd driri85 309 259 11ms 15 Dec 2025 123rd LostSyntax21 🇬🇧 308 260 10ms 27 Nov 2024 124th alemelis 295 271 11ms 17 Oct 2024 125th jtaxen 273 293 11ms 10 May 2024 126th eiburns 268 298 18ms 27 Oct 2023 127th Andrey2001 267 300 18ms 31 Jan 2026 128th JesseNoEyes 🇺🇸 265 302 11ms 19 Jan 2026 129th TaserTheFox 🇺🇸 261 307 17ms 24 Mar 2023 130th nstearns96 🇬🇧 257 311 12ms 13 Oct 2025 131st TheZwierzLF 🇵🇱 249 321 10ms 7 Dec 2025 132nd mbittner20 242 330 11ms 27 May 2023 132nd mathisfun271 242 330 16ms 19 Feb 2024 134th ComputerKWasTaken 🇺🇸 240 334 10ms 8 Jun 2024 135th rollershutter 237 338 1,015ms 21 Jun 2023 136th KenanHanke 235 341 11ms 17 Aug 2025 137th cros107 🇦🇺 234 342 17ms 31 Aug 2023 138th adamnielson42 🇺🇸 225 355 11ms 1 Dec 2023 139th tomh1012 212 378 12ms 24 days ago 140th muser-logiccpu 🇺🇦 207 386 11ms 19 Aug 2025 141st Thestralos 203 394 11ms 24 Feb 2023 142nd brimstonetrader 119 675 11ms 28 Feb 2024 143rd Zhenyu-Bo 101 794 11ms 1 Aug 2025 144th atazzam 🇺🇸 81 987 13ms 12 Feb 2023 145th AidanWalter 80 1,004 10ms 3 Jan 2025 First Prev 81–145 of 145
