2015 day 4
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@ -9,6 +9,7 @@ public class Test2015
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[DataRow(typeof(Day01), "232", "1783")]
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[DataRow(typeof(Day02),"1586300", "3737498")]
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[DataRow(typeof(Day03), "2081", "2341")]
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// [DataRow(typeof(Day04), "346386", "9958218")]
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public void TestAllDays(Type dayType, string part1, string part2)
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{
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Common.CheckDay(dayType, part1, part2);
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@ -18,6 +19,7 @@ public class Test2015
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[DataRow(typeof(Day01), "-1", "5")]
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[DataRow(typeof(Day02), "58", "34")]
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[DataRow(typeof(Day03), "2", "11")]
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// [DataRow(typeof(Day04), "609043", "6742839")]
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public void CheckTestInputs(Type dayType, string part1, string part2)
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{
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Day.UseTestInput = true;
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@ -1,15 +1,44 @@
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namespace AOC2015;
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using System.Security.Cryptography;
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namespace AOC2015;
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/// <summary>
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/// Day 4: <see href="https://adventofcode.com/2015/day/4"/>
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/// </summary>
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public sealed class Day04 : Day
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{
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private readonly string _key;
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public Day04() : base(2015, 4, "Puzzle Name")
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{
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_key = Input.First();
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}
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public override object Part1() => "";
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public override object Part1()
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{
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var md5 = MD5.Create();
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var counter = 0;
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public override object Part2() => "";
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while (true)
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{
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var hash = md5.ComputeHash(Encoding.ASCII.GetBytes(_key + counter));
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if (BitConverter.ToString(hash).Replace("-", "").StartsWith("00000"))
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return counter;
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counter++;
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}
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}
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public override object Part2()
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{
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var md5 = MD5.Create();
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var counter = 0;
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while (true)
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{
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var hash = md5.ComputeHash(Encoding.ASCII.GetBytes(_key + counter));
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if (BitConverter.ToString(hash).Replace("-", "").StartsWith("000000"))
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return counter;
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counter++;
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}
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}
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}
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@ -0,0 +1 @@
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abcdef
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