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?
Intersection 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 240th thisishowmymindworks 🇳🇴 766 141 17ms 17 Oct 2020 240th lemogne 766 141 10ms 9 Aug 2021 240th HerLovelyTentacles 766 141 10ms 22 Nov 2021 240th osmith93 766 141 10ms 10 Jul 2022 240th DavidHospital 766 141 10ms 22 Sep 2023 240th Peanut-XIV 766 141 10ms 9 Nov 2023 240th ridingqwerty 🇺🇸 766 141 10ms 1 Feb 2024 240th elgan65536 🇺🇸 766 141 11ms 6 Apr 2024 240th inverseLorentz 🇦🇺 766 141 10ms 22 Apr 2024 240th yokasuretsu 766 141 11ms 10 Jan 2025 240th khaninm 766 141 11ms 2 Jun 2025 240th Ignacio6D2 766 141 11ms 26 Feb 2026 253rd logvp 761 142 10ms 3 Jan 2024 253rd countlpaul-dotcom 761 142 10ms 19 Oct 2025 255th hiichbindermax 755 143 30ms 24 Feb 2022 255th SaswatPadhi 755 143 10ms 5 Sep 2022 257th jgbaldwinbrown 750 144 10ms 29 Jun 2021 257th HumanoidCPU 750 144 10ms 1 Nov 2024 257th rollershutter 750 144 10ms 8 Oct 2025 257th Aphadion 750 144 11ms 19 Feb 2026 261st maggym00 745 145 10ms 27 Apr 2021 261st AkashTandon167 745 145 11ms 25 May 2021 261st LeeCamp 745 145 10ms 9 Dec 2021 261st eshilo-draper 745 145 17ms 15 Jun 2023 261st Ythaenagor 745 145 17ms 5 Aug 2024 261st JunkIce 745 145 17ms 4 Oct 2024 267th MisterrLuck 740 146 10ms 3 Sep 2023 267th Command-Master 740 146 11ms 24 Sep 2023 267th solisolu 740 146 10ms 7 Nov 2025 267th error256 740 146 15ms 16 Feb 2026 271st mossprescott 730 148 10ms 17 Jan 2023 271st aksyristos 730 148 10ms 28 Feb 2023 273rd NicoAdams 720 150 10ms 21 Nov 2021 273rd fgrosshans 🇫🇷 720 150 10ms 12 Jan 2022 273rd MaxElf999 720 150 10ms 27 Sep 2022 273rd egasyelir 720 150 10ms 13 Jul 2024 273rd voytxt 🇨🇿 720 150 11ms 19 Feb 2026 278th cpeck-rmvd 715 151 11ms 18 Jan 2023 279th Pena86 711 152 16ms 14 Mar 2021 279th BREMAUCY 🇫🇷 711 152 10ms 22 Sep 2025 279th helbling 🇨🇭 711 152 12ms 16 Feb 2026 282nd vishwathg 706 153 24ms 27 Sep 2022 282nd mbittner20 706 153 10ms 27 May 2023 284th Starwort 🇬🇧 701 154 11ms 5 Mar 2021 284th nstearns96 🇬🇧 701 154 10ms 15 Dec 2022 286th sciencejiho 697 155 10ms 26 Sep 2024 287th Anonymousellama21 692 156 10ms 8 Dec 2021 287th Bananapants22 692 156 10ms 30 Aug 2022 287th NickTheEASDude 🇺🇸 692 156 11ms 6 May 2024 290th Andre3582 688 157 12ms 6 Nov 2020 290th DrPiranoid 688 157 10ms 24 Sep 2022 290th Bodo171 688 157 17ms 27 Nov 2022 290th gthayden23 688 157 30ms 29 Oct 2023 290th vhoulbreque 🇫🇷 688 157 1,458ms 3 Dec 2025 290th retrohun 688 157 19ms 22 Feb 2026 296th Omega65536 🇩🇪 684 158 10ms 7 Jan 2021 296th Bonjour27891 🇻🇳 684 158 11ms 13 Mar 2022 296th Tess2662 684 158 15ms 4 Mar 2023 296th jeff-at-tamer-dot-codes 🇺🇸 684 158 10ms 18 May 2023 296th Player01osu 684 158 10ms 29 Oct 2023 296th epic-programmer-guy 684 158 10ms 31 Dec 2023 296th robin-scragg 684 158 11ms 9 Oct 2025 303rd glesnick 679 159 10ms 15 Jul 2022 304th vezzick 675 160 10ms 5 Mar 2021 304th roguh 🇬🇹 675 160 10ms 23 Jan 2024 306th ehulinsky 🇺🇸 671 161 28ms 15 Sep 2021 306th WillowWispy 671 161 11ms 14 Mar 2025 308th Marthe-CC 667 162 10ms 16 Oct 2022 308th Cynopolis 667 162 10ms 17 Oct 2023 310th Wildst 659 164 11ms 7 Jul 2023 310th jameswmccarty 659 164 12ms 28 Mar 2025 312th za3k 655 165 10ms 9 Oct 2022 313th SniperSmiley 🇺🇸 651 166 10ms 15 Jun 2022 313th DrPrettyman 651 166 10ms 11 Jul 2023 313th askipio 651 166 11ms 22 Nov 2023 313th qwjhvbxi 651 166 10ms 10 Feb 2024 313th prestosilver 🇺🇸 651 166 11ms 17 Feb 2026 318th petroselo 647 167 10ms 15 Dec 2020 318th NoahBolohan 🇨🇦 647 167 10ms 9 Feb 2023 318th KatieLG-Transpiler 🇬🇧 647 167 10ms 9 Jan 2026 First Prev 241–320 of 399 Next Last