The Set hole will go live in approximately 2 days. Why not try and solve it ahead of time?
Leap Years in C# in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 Maze Medal Tally 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 Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Set Snake Sphenic Numbers Star Wars GPT Trinomial Triangle Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 F# Factor Forth Fortran Gleam Go GolfScript 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 Erlang Fennel Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Maze Medal Tally 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 Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Mandelbrot Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion QR Encoder Quadratic Formula Scrambled Alphabetization Semiprime Numbers Set Snake Sphenic Numbers Star Wars GPT Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 1st JayXon 🇺🇸 1,000 59 21 Nov 2021 1st Lydxn 🇨🇦 1,000 59 21 Nov 2021 1st lynn 1,000 59 21 Nov 2021 1st primo-ppcg 🇹🇭 1,000 59 21 Nov 2021 1st btnlq 1,000 59 22 Dec 2021 6th Attero 🇸🇪 967 61 21 Nov 2021 6th nwellnhof 🇩🇪 967 61 21 Nov 2021 6th sean-niemann 🇺🇸 967 61 21 Nov 2021 6th tomtheisen 🇺🇸 967 61 21 Nov 2021 6th MeWhenI 🇻🇦 967 61 10 Oct 2022 6th Steffan153 🇫🇮 967 61 1 Jan 2023 6th stefangimmillaro 967 61 4 Aug 2023 6th DialFrost 🇸🇬 967 61 8 Nov 2023 6th namelessiw 967 61 11 Jul 2024 6th dokutan 967 61 25 Sep 2024 6th pardouin 🇫🇷 967 61 26 Sep 2024 6th b-illy 🇬🇧 967 61 21 Jan 2025 18th initram 952 62 21 Nov 2021 18th janbehrens 🇩🇪 952 62 21 Nov 2021 18th jmhowl 952 62 21 Nov 2021 18th ScottHamper 952 62 21 Nov 2021 18th Irratix 🇳🇱 952 62 13 Dec 2021 18th simon-biber 952 62 7 Feb 2022 18th annaproxy 952 62 15 Mar 2022 18th voytxt 🇨🇿 952 62 7 Apr 2022 18th logicolor 952 62 27 Apr 2022 18th Gaddy 🇫🇷 952 62 2 May 2022 18th Romain-1 🇫🇷 952 62 3 May 2022 18th AdrienHache 🇫🇷 952 62 6 Jun 2023 18th jwonagel 952 62 25 Sep 2023 18th Yax42 🇫🇷 952 62 18 Nov 2024 32nd billings7 🇬🇧 937 63 21 Nov 2021 32nd ChristophHornung 937 63 21 Nov 2021 32nd KatieLG 🇬🇧 937 63 17 Oct 2022 35th daniel-skalik 🇨🇿 922 64 21 Nov 2021 35th fleischa 922 64 21 Nov 2021 35th Kloppermand 🇩🇰 922 64 21 Nov 2021 35th p-vf 🇨🇭 922 64 21 Nov 2021 35th raphaelimahorn 922 64 21 Nov 2021 35th revlayle 🇺🇸 922 64 21 Nov 2021 35th roavin 922 64 5 Jul 2022 35th dteague3989 922 64 26 May 2023 35th fuzzylojik-golf 🇺🇸 922 64 14 Oct 2023 44th Shanethegamer 🇺🇸 908 65 21 Nov 2021 44th AdrialaD 908 65 21 Nov 2021 44th aliakseikalosha 908 65 21 Nov 2021 44th Dersei 908 65 21 Nov 2021 44th eldritchconundrum 908 65 21 Nov 2021 44th Meowsan91 🇨🇿 908 65 21 Nov 2021 44th petroselo 908 65 21 Nov 2021 44th FrederikHutfless 🇩🇪 908 65 12 Jan 2023 44th Yewzir 908 65 7 Feb 2024 44th HumanoidCPU 908 65 19 Feb 2024 54th Alikont 894 66 21 Nov 2021 54th Jeffreyvde 894 66 21 Nov 2021 54th Rens-br 894 66 21 Nov 2021 54th Rhexis 894 66 21 Nov 2021 54th KrausRaus 🇺🇸 894 66 15 Dec 2021 54th hamhub7 894 66 3 Aug 2022 54th Betuaredead 894 66 4 Jan 2023 54th msbranicky 894 66 6 Jul 2023 54th josephdwalker 894 66 14 Nov 2023 54th JDiLenarda 🇫🇷 894 66 14 Nov 2023 54th ElysiaVesper 894 66 15 Nov 2023 54th albanian-laundromat 894 66 18 days ago 66th thisishowmymindworks 🇳🇴 881 67 21 Nov 2021 66th ToriTheChicken 881 67 21 Nov 2021 66th najs91 881 67 23 Nov 2021 66th Seanharrs 881 67 3 Dec 2021 66th postie77 881 67 17 Nov 2022 66th astdefu 881 67 10 Dec 2022 66th dorschmeister 881 67 18 May 2023 66th Matgc04 881 67 20 May 2023 66th Adix-null 🇱🇹 881 67 6 Jun 2023 66th rifatx 881 67 9 Jul 2024 1–75 of 151 Next