The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
Topological Sort in all languages 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 161st snoozingnewt 🇨🇦 720 129 323ms 22 Nov 2025 162nd bricknellj 712 126 19ms 14 Jul 2025 163rd Shanethegamer 🇺🇸 712 259 882ms 8 Aug 2025 164th Shanethegamer 🇺🇸 710 184 1,616ms 12 Aug 2025 165th DialFrost 🇸🇬 709 131 133ms 22 Nov 2025 166th saito-ta 🇯🇵 707 41 650ms 30 Jul 2025 167th albanian-laundromat 707 127 31ms 10 Jul 2025 167th ndren 707 127 61ms 3 Aug 2025 169th edsrzf 🇳🇿 704 218 4,369ms 24 Oct 2025 170th Natanaelel 🇸🇪 701 128 117ms 21 Jul 2025 170th snoozingnewt 🇨🇦 701 128 46ms 8 days ago 172nd namelessiw 699 167 515ms 2 Aug 2025 173rd MeWhenI 🇻🇦 696 129 33ms 12 Jul 2025 173rd BREMAUCY 🇫🇷 696 129 51ms 6 Aug 2025 173rd sean-niemann 🇺🇸 696 129 79ms 2 days ago 176th albanian-laundromat 696 253 294ms 16 Oct 2025 177th SirBogman 🇺🇸 695 113 936ms 4 Aug 2025 178th Sakisan 🇧🇪 694 164 181ms 5 Aug 2025 179th m-tkach 🇺🇦 693 264 261ms 1 Aug 2025 180th davecame 690 130 20ms 9 Aug 2025 180th RYNO8 690 130 90ms 6 Oct 2025 182nd sean-niemann 🇺🇸 689 114 743ms 2 days ago 183rd sean-niemann 🇺🇸 685 200 416ms 16 days ago 184th commandblockguy 🇺🇸 683 115 610ms 1 Sep 2025 185th CornerMercury 🇬🇧 680 132 16ms 3 Nov 2025 185th emgordon154 680 132 153ms 18 Nov 2025 187th albanian-laundromat 680 145 883ms 25 Sep 2025 188th Natanaelel 🇸🇪 679 71 28ms 31 Jul 2025 189th snoozingnewt 🇨🇦 677 116 537ms 8 days ago 190th ahmetdemirag 🇨🇾 670 134 40ms 10 Aug 2025 190th btjones0 670 134 16ms 8 Sep 2025 192nd albanian-laundromat 669 204 1,457ms 2 Nov 2025 193rd voytxt 🇨🇿 668 123 16ms 28 Jul 2025 194th albanian-laundromat 668 276 2,316ms 21 days ago 195th plcc0 665 135 16ms 4 Aug 2025 196th jupj 🇫🇮 663 185 3ms 28 Aug 2025 197th albanian-laundromat 660 119 595ms 4 Aug 2025 198th annaproxy 655 137 18ms 5 Sep 2025 198th FortuiteMan 🇫🇷 655 137 18ms 26 days ago 200th nwellnhof 🇩🇪 652 62 114ms 2 Aug 2025 201st emgordon154 649 121 723ms 18 Nov 2025 202nd trinityy-7 647 127 11ms 6 Aug 2025 203rd AlephSquirrel 644 122 689ms 10 Jul 2025 204th Shanethegamer 🇺🇸 644 158 4ms 8 Aug 2025 205th edsrzf 🇳🇿 643 167 4,660ms 14 Aug 2025 206th andrewjc2000 641 140 17ms 2 Aug 2025 206th hiichbindermax 641 140 16ms 4 Aug 2025 208th SirBogman 🇺🇸 639 80 2,334ms 8 Aug 2025 209th CaedenHarper 🇨🇦 628 143 17ms 3 Oct 2025 210th sean-niemann 🇺🇸 627 131 35ms 2 days ago 211th Shanethegamer 🇺🇸 625 106 1,217ms 16 Aug 2025 212th Ripick 625 209 390ms 5 Aug 2025 213th Shanethegamer 🇺🇸 624 92 56ms 8 Aug 2025 214th Natanaelel 🇸🇪 622 65 67ms 31 Jul 2025 215th error256 617 93 59ms 6 Aug 2025 216th error256 617 189 186ms 7 Aug 2025 217th InigoK 🇺🇸 615 146 16ms 3 Sep 2025 218th MeWhenI 🇻🇦 614 128 580ms 16 Nov 2025 219th Shanethegamer 🇺🇸 613 134 13ms 12 Jul 2025 220th GolfingSuccess 🇬🇷 613 200 3ms 23 Jul 2025 221st albanian-laundromat 608 192 447ms 2 Nov 2025 222nd Shanethegamer 🇺🇸 606 156 4,122ms 10 Aug 2025 223rd KatieLG 🇬🇧 602 149 70ms 22 Sep 2025 224th jerrandolph 595 344 294ms 20 Sep 2025 225th YAJUE114514 594 151 15ms 1 Aug 2025 225th vgamula 🇺🇦 594 151 17ms 4 Aug 2025 225th anter69 🇭🇺 594 151 44ms 27 Aug 2025 228th SirBogman 🇺🇸 587 79 38ms 8 Aug 2025 229th MeWhenI 🇻🇦 580 50 95ms 30 Jul 2025 229th emgordon154 580 50 1,203ms 6 Nov 2025 231st albanian-laundromat 578 226 563ms 22 Aug 2025 232nd albanian-laundromat 572 178 100ms 16 Oct 2025 233rd SirBogman 🇺🇸 569 51 8ms 5 Aug 2025 234th alemelis 568 158 16ms 2 Aug 2025 234th dirckvdende 568 158 17ms 4 Aug 2025 234th cros107 🇦🇺 568 158 17ms 12 Aug 2025 237th CaedenHarper 🇨🇦 565 139 462ms 3 Oct 2025 238th aiwana 562 469 404ms 25 Oct 2025 239th CatsAreFluffy 561 93 52ms 30 Oct 2025 240th FEZfan 🇦🇺 561 160 29ms 11 Jul 2025 First Prev 161–240 of 345 Next Last