The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
Rijndael S-box 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 720th KatieLG 🇬🇧 241 795 114ms 2 Sep 2023 720th KatieLG-Transpiler 🇬🇧 241 795 109ms 2 Sep 2023 720th msbranicky 241 795 111ms 11 Sep 2023 720th HumanoidCPU 241 795 104ms 16 Apr 2024 720th Mabeloid 🇳🇴 241 795 123ms 21 Sep 2024 720th CaedenHarper 🇨🇦 241 795 109ms 21 Jan 2025 727th msbranicky 240 596 1ms 10 Oct 2023 728th dokutan 240 695 4ms 26 Mar 2025 729th snoozingnewt 🇨🇦 240 798 105ms 4 Sep 2023 730th MeWhenI 🇻🇦 239 800 109ms 1 Sep 2023 731st thisishowmymindworks 🇳🇴 237 557 9ms 15 Jun 2024 731st voytxt 🇨🇿 237 557 9ms 7 Aug 2024 733rd MeWhenI 🇻🇦 237 776 5ms 1 Sep 2023 733rd Shanethegamer 🇺🇸 237 776 5ms 1 Sep 2023 733rd KatieLG 🇬🇧 237 776 5ms 2 Sep 2023 733rd KatieLG-Transpiler 🇬🇧 237 776 5ms 2 Sep 2023 733rd scpchicken 🇵🇼 237 776 5ms 14 Nov 2023 733rd HumanoidCPU 237 776 5ms 4 May 2024 733rd dokutan 237 776 5ms 24 Jun 2024 733rd Mabeloid 🇳🇴 237 776 5ms 21 Sep 2024 733rd CaedenHarper 🇨🇦 237 776 6ms 20 Jan 2025 742nd Jacob385 236 2,150 5ms 4 Aug 2024 743rd snoozingnewt 🇨🇦 235 781 5ms 5 Sep 2023 744th KatieLG 🇬🇧 235 797 8ms 2 Sep 2023 744th KatieLG-Transpiler 🇬🇧 235 797 8ms 2 Sep 2023 746th coreynash 234 563 8ms 16 Feb 2024 747th two-bad 🇬🇧 233 565 8ms 25 Feb 2024 748th bac0id 233 587 356ms 9 Jan 2025 749th cbrt-x 233 821 109ms 9 Oct 2023 750th olleicua 🇺🇸 232 460 38ms 11 Apr 2024 751st ArmaanAS 232 567 9ms 23 Feb 2025 752nd msbranicky 232 678 1,676ms 17 Sep 2025 753rd dokutan 231 570 9ms 13 Mar 2025 754th olleicua 🇺🇸 230 572 9ms 13 Feb 2024 755th scpchicken 🇵🇼 229 454 4ms 1 Nov 2023 756th alexsave 228 577 9ms 4 Nov 2025 757th rgthree 228 579 9ms 5 Sep 2023 758th msbranicky 228 635 279ms 1 Sep 2023 759th BREMAUCY 🇫🇷 227 329 2ms 1 Nov 2025 760th FortuiteMan 🇫🇷 225 231 54ms 19 days ago 761st dokutan 225 569 2ms 6 Jun 2024 762nd KatieLG-Transpiler 🇬🇧 225 2,253 5ms 2 Sep 2023 763rd voytxt 🇨🇿 224 609 369ms 4 Nov 2024 764th KatieLG 🇬🇧 224 2,269 5ms 28 Sep 2024 765th alphafalfa 223 572 14ms 1 Aug 2025 766th iczelia 🇩🇪 223 591 8ms 8 Nov 2025 767th dokutan 221 584 801ms 13 days ago 768th msbranicky 221 617 351ms 8 Sep 2023 769th HumanoidCPU 220 571 395ms 12 Nov 2025 770th gifti258 220 585 189ms 13 Sep 2023 771st msbranicky 220 594 83ms 1 Sep 2023 772nd moustave 219 559 9ms 26 Mar 2025 773rd dokutan 219 574 119ms 13 Mar 2025 774th msbranicky 219 601 8ms 8 Sep 2023 775th dokutan 219 624 324ms 5 Jun 2024 776th Ripick 218 343 2ms 22 Oct 2025 777th dokutan 217 564 218ms 18 Mar 2025 778th Shanethegamer 🇺🇸 217 777 41ms 22 Aug 2024 778th KatieLG 🇬🇧 217 777 40ms 22 Aug 2024 778th dokutan 217 777 41ms 24 Aug 2024 778th HumanoidCPU 217 777 39ms 25 Aug 2024 778th Mabeloid 🇳🇴 217 777 41ms 21 Sep 2024 778th error256 217 777 42ms 10 Jan 2025 778th CaedenHarper 🇨🇦 217 777 39ms 22 Jan 2025 778th gigaprofisi 🇺🇸 217 777 40ms 5 Nov 2025 786th TheZwierzLF 🇵🇱 216 346 2ms 25 Nov 2025 787th msbranicky 216 580 443ms 16 Jan 2024 788th msbranicky 216 678 393ms 8 Sep 2023 789th Shanethegamer 🇺🇸 215 775 3ms 1 Sep 2023 789th CaedenHarper 🇨🇦 215 775 3ms 22 Jan 2025 791st MeWhenI 🇻🇦 215 776 3ms 1 Sep 2023 791st KatieLG-Transpiler 🇬🇧 215 776 4ms 2 Sep 2023 791st KatieLG 🇬🇧 215 776 4ms 28 Sep 2024 794th CommandLeo 🇮🇹 214 570 10ms 22 days ago 795th msbranicky 214 571 185ms 15 Jan 2024 796th HumanoidCPU 214 572 11ms 12 Nov 2025 797th MichalMarsalek 🇨🇿 211 570 124ms 1 Sep 2023 798th msbranicky 211 580 11ms 1 Sep 2023 799th dokutan 211 686 250ms 10 days ago 800th snoozingnewt 🇨🇦 211 791 4ms 2 Sep 2023 First Prev 721–800 of 1,373 Next Last