Day 6 completed

Day_6/Day_6.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Day_6", "Day_6\Day_6.csproj", "{B72F9692-1289-411D-BC2B-9DAB18435429}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B72F9692-1289-411D-BC2B-9DAB18435429}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B72F9692-1289-411D-BC2B-9DAB18435429}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B72F9692-1289-411D-BC2B-9DAB18435429}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B72F9692-1289-411D-BC2B-9DAB18435429}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

Day_6/Day_6/Day_6.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net7.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <None Update="test.txt">
+        <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+      </None>
+      <None Update="data.txt">
+        <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+      </None>
+    </ItemGroup>
+
+</Project>

Day_6/Day_6/Program.cs

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+
+const string FILE = "data.txt";
+
+var lines = await ReadData();
+var times = lines[0]
+    .Split(":")[1]
+    .Trim()
+    .Split(" ", StringSplitOptions.RemoveEmptyEntries)
+    .Select(s => int.Parse(s))
+    .ToList();
+var distances = lines[1]
+    .Split(":")[1]
+    .Trim()
+    .Split(" ", StringSplitOptions.RemoveEmptyEntries)
+    .Select(s => int.Parse(s))
+    .ToList();
+
+//var winningOptions = new int[times.Count];
+
+// for (int i = 0; i < times.Count; i++)
+// {
+//     var time = times[i];
+//     var recordDistance = distances[i];
+//     var lastDistance = Int32.MinValue;
+//     var winningOption = 0;
+//
+//     for (int j = 2; j < time; j++)
+//     {
+//         var remaingingTime = time - j;
+//         var distance = j * remaingingTime;
+//
+//         if (distance < lastDistance && distance < recordDistance)
+//             break;
+//         
+//         if (distance > recordDistance)
+//             winningOption++;
+//             
+//         lastDistance = distance;
+//     }
+//
+//     winningOptions[i] = winningOption;
+// }
+
+var winningOptions = 0;
+
+ulong recordDistance = 298118510661181;
+ulong time = 49787980;
+var lastDistance = Int128.MinValue;
+
+for (ulong j = 2; j < time; j++)
+{
+    var remaingingTime = time - j;
+    ulong distance = j * remaingingTime;
+
+    if (distance < lastDistance && distance < recordDistance)
+        break;
+
+    if (distance > recordDistance)
+        winningOptions++;
+
+    lastDistance = distance;
+    //Console.WriteLine($"DISTANCE: {distance}\t\tRECORD_DISTANCE: {recordDistance}");
+}
+
+
+Console.WriteLine(winningOptions);
+
+async Task<List<string>> ReadData()
+{
+    var lines = await File.ReadAllLinesAsync(FILE);
+
+    return lines.ToList();
+}

Day_6/Day_6/data.txt

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+Time:        49     78     79     80
+Distance:   298   1185   1066   1181

Day_6/Day_6/test.txt

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+Time:      7  15   30
+Distance:  9  40  200