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2025/01
1 parent 73ec449 commit d0f51e9

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‎.vscode/launch.json‎

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"request": "launch",
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"preLaunchTask": "build",
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// If you have changed target frameworks, make sure to update the program path.
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"program": "${workspaceFolder}/bin/Debug/net10.0/adventofcode.dll",
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"program": "${workspaceFolder}/bin/Debug/net10.0/osx-arm64/adventofcode.dll",
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"args": ["${relativeFileDirname}"],
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"cwd": "${workspaceFolder}",
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// For more information about the 'console' field, see https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md#console-terminal-window

‎2025/Day01/README.md‎

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## --- Day 1: Secret Entrance ---
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The Elves have good news and bad news.
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The good news is that they've discovered [project management](https://en.wikipedia.org/wiki/Project_management)! This has given them the tools they need to prevent their usual Christmas emergency. For example, they now know that the North Pole decorations need to be finished soon so that other critical tasks can start on time.
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_Visit the website for the full story and [full puzzle](https://adventofcode.com/2025/day/1) description._
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‎2025/Day01/Solution.cs‎

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namespace AdventOfCode.Y2025.Day01;
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using System.Collections.Generic;
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using System.Linq;
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[ProblemName("Secret Entrance")]
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class Solution : Solver {
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public object PartOne(string input) => Dial(Parse(input)).Count(x => x == 0);
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public object PartTwo(string input) => Dial(Parse2(input)).Count(x => x == 0);
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IEnumerable<int> Dial(IEnumerable<int> rotations) {
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int pos = 50;
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foreach (var rotation in rotations) {
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pos = (pos + rotation + 100) % 100;
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yield return pos;
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}
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}
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IEnumerable<int> Parse(string input) =>
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from line in input.Split("\n")
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let d = line[0] == 'R' ? 1 : -1
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let a = int.Parse(line.Substring(1))
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select a * d;
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IEnumerable<int> Parse2(string input) =>
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from line in input.Split("\n")
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let d = line[0] == 'R' ? 1 : -1
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let a = int.Parse(line.Substring(1))
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from i in Enumerable.Range(0, a)
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select d;
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}

‎2025/Day01/input.in‎

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‎2025/Day01/input.refout‎

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‎2025/README.md‎

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# Advent of Code (2025)
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Check out https://adventofcode.com/2025.
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<a href="https://adventofcode.com/2025"><img src="calendar.svg" width="80%" /></a>

‎2025/SplashScreen.cs‎

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using System;
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namespace AdventOfCode.Y2025;
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class SplashScreenImpl : SplashScreen {
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public void Show() {
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var color = Console.ForegroundColor;
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Write(0xcc00, false, " ▄█▄ ▄▄█ ▄ ▄ ▄▄▄ ▄▄ ▄█▄ ▄▄▄ ▄█ ▄▄ ▄▄▄ ▄▄█ ▄▄▄\n █▄█ █ █ █ █ █▄█ █ █ █ █ █ █▄ ");
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Write(0xcc00, false, " █ █ █ █ █ █▄█\n █ █ █▄█ ▀▄▀ █▄▄ █ █ █▄ █▄█ █ █▄ █▄█ █▄█ █▄▄ /* 2025 */\n \n ");
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Write(0xcc00, false, " ");
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Write(0xffffff, false, "'.'. ____ ' ... ");
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Write(0xffff66, true, "* ");
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Write(0xffffff, false, "' . .' .. ");
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Write(0xff9900, false, "<");
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Write(0xffffff, false, "o ' . \n ________/");
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Write(0x999999, false, "O___");
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Write(0xffffff, false, "\\__________");
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Write(0xff0000, false, "|");
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Write(0xffffff, false, "_________________O______ ");
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Write(0xcccccc, false, " 1 ");
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Write(0xffff66, false, "**\n ");
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Write(0x333333, false, " _______||_________ \n | _@__ || _o_ | ");
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Write(0x333333, false, " ");
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Write(0x666666, false, " 2\n ");
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Write(0x333333, false, " |_&_%__||_oo__^=_[ \n ");
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Write(0x333333, false, " ");
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Write(0x666666, false, " 3\n \n ");
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Write(0x666666, false, " 4\n ");
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Write(0x666666, false, " \n 5\n ");
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Write(0x666666, false, " \n ");
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Write(0x666666, false, "6\n \n ");
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Write(0x666666, false, " 7\n ");
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Write(0x666666, false, " \n 8\n ");
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Write(0x666666, false, " \n 9");
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Write(0x666666, false, "\n \n ");
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Write(0x666666, false, " 10\n ");
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Write(0x666666, false, " \n 11\n ");
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Write(0x666666, false, " \n 12\n");
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Write(0x666666, false, " \n");
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Console.ForegroundColor = color;
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Console.WriteLine();
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}
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private static void Write(int rgb, bool bold, string text){
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Console.Write($"\u001b[38;2;{(rgb>>16)&255};{(rgb>>8)&255};{rgb&255}{(bold ? ";1" : "")}m{text}");
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}
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}

‎2025/calendar.svg‎

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‎adventofcode.csproj‎

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<TargetFramework>net10.0</TargetFramework>
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<LangVersion>14</LangVersion>
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<CheckForOverflowUnderflow>true</CheckForOverflowUnderflow>
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<UseAppHost>false</UseAppHost>
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<SelfContained>true</SelfContained>
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<!-- <UseAppHost>true</UseAppHost> -->
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<EnableDynamicCodeSupport>true</EnableDynamicCodeSupport>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="AngleSharp" Version="0.14.0" />
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<PackageReference Include="AngleSharp.Css" Version="0.14.0" />
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</ItemGroup>
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</Project>
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</Project>

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