The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Happy Numbers 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 640th OppositeShark 306 157 11ms 19 Jul 2022 642nd j3mak 304 158 11ms 16 Jan 2024 643rd qewdweftr4g 302 159 11ms 16 Oct 2024 644th rajlath 300 160 10ms 9 Apr 2018 645th peculiarination 296 162 17ms 11 May 2021 645th Ugoran 296 162 10ms 1 Dec 2022 647th Ty-Cyr 294 163 10ms 13 Jul 2023 648th tbadun 293 164 14ms 8 Oct 2022 648th Natz12 293 164 10ms 27 Jan 2023 650th Pimveha 291 165 12ms 11 Jan 2023 651st EB-Brown 289 166 11ms 23 Aug 2019 652nd tombs4 286 168 11ms 8 Jun 2020 653rd YoungjuneKwon 282 170 11ms 6 Dec 2018 654th hotmanga 281 171 9ms 7 Nov 2023 654th xbxbxb007 281 171 10ms 10 Jan 2024 656th janga1 279 172 17ms 12 Aug 2021 656th GitQuick 279 172 11ms 9 Mar 2024 658th chriscconte 277 173 11ms 16 Apr 2019 658th jjbvtk 277 173 12ms 3 Sep 2021 660th devRND-ess 267 180 14ms 30 Apr 2020 660th GlennHA 267 180 9ms 15 May 2021 660th theunofficialcoder 267 180 10ms 12 Jan 2024 663rd willzywiec 265 181 9ms 5 Aug 2018 663rd Unknownuserfrommars 265 181 11ms 20 Nov 2024 665th zuparnowa 264 182 17ms 23 Jan 2019 665th henrytranter 264 182 16ms 20 Sep 2019 667th dylanjones92 261 184 10ms 17 Jan 2024 668th shinylego 259 185 11ms 19 Oct 2022 669th Aniketgautam 255 188 10ms 6 Apr 2018 669th schmisev 255 188 11ms 11 Oct 2018 669th alfonsoalves 255 188 10ms 27 Feb 2024 672nd Bananapants22 254 189 11ms 16 Aug 2022 673rd jmmographer 253 190 12ms 20 Oct 2023 674th AbuzarN 250 192 10ms 4 Oct 2023 675th rohan335 245 196 11ms 24 Jul 2024 676th newc0m 236 203 19ms 7 Dec 2018 677th muser-logiccpu 🇺🇦 235 204 10ms 9 Aug 2025 678th ariesmarinus 231 208 10ms 3 Dec 2024 679th itljan30 222 216 13ms 6 Oct 2024 680th janedoloris 219 219 10ms 14 Feb 2021 680th RobinStevenMartinez 219 219 10ms 27 Aug 2021 680th atazzam 🇺🇸 219 219 11ms 2 Apr 2022 683rd eje24 215 223 20ms 22 Jul 2020 684th BLD933 🇲🇦 211 227 12ms 2 Sep 2023 685th kevinnaviapaiva 211 228 9ms 13 Feb 2025 686th DylanGodfrey 207 232 11ms 5 Jun 2018 687th clodalala 205 234 11ms 13 Nov 2019 688th dens558 203 237 9ms 25 May 2019 689th fl3ur1nestimable 200 240 10ms 3 Apr 2022 690th PrestonWin 193 249 10ms 20 Nov 2021 691st twrogers1 186 258 10ms 17 Aug 2020 692nd kpasc 183 262 10ms 13 Jul 2018 693rd scottJsonar 178 269 9ms 29 Nov 2019 694th wrhm 174 276 9ms 12 Dec 2020 695th sayloren 169 284 11ms 11 Jun 2021 696th EmadAIsmael 166 290 10ms 16 Jan 2019 697th cybermoonman 164 293 24ms 23 Aug 2020 698th Emsi7 161 299 9ms 14 Jun 2023 699th Zhenyu-Bo 157 306 10ms 1 Aug 2025 700th NuqieNoila 153 314 12ms 1 Feb 2019 701st breeezi 143 335 10ms 3 Feb 2020 702nd Noooiz 142 338 12ms 30 Dec 2018 703rd valdemarsoegaard 141 341 10ms 2 Dec 2020 704th gregorywood99 135 356 9ms 20 Sep 2021 705th 1isaaclaryea 133 362 10ms 29 May 2020 706th cva 123 391 10ms 16 Apr 2020 707th sandybeachum 112 429 11ms 19 Mar 2021 708th somT-oss 109 440 10ms 28 Nov 2024 709th Crankbrother 108 446 11ms 25 Jun 2020 710th enok82 106 453 16ms 3 Sep 2019 711th Balaji-Jag 89 541 10ms 12 Nov 2019 712th nikkipinky 51 947 12ms 4 Jan 2021 First Prev 641–712 of 712
