Day 4 (Part 1)

MartinZikmund · Dec 4, 2023 · 9d91270 · 9d91270
1 parent 5d009df
commit 9d91270
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diff --git a/AdventOfCode.sln b/AdventOfCode.sln
@@ -17,6 +17,10 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Day03_1", "Day03_1\Day03_1.
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Day03_2", "Day03_2\Day03_2.csproj", "{84C038A1-55B0-4D9A-B3B3-6A0FD6C53C92}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Day04_1", "Day04_1\Day04_1.csproj", "{7D5E97E4-9D73-4B29-8E72-2C77242C4613}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Day04_2", "Day04_2\Day04_2.csproj", "{A807C4E1-E04B-4608-9511-56473340E01F}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -51,6 +55,14 @@ Global
 		{84C038A1-55B0-4D9A-B3B3-6A0FD6C53C92}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{84C038A1-55B0-4D9A-B3B3-6A0FD6C53C92}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{84C038A1-55B0-4D9A-B3B3-6A0FD6C53C92}.Release|Any CPU.Build.0 = Release|Any CPU
+		{7D5E97E4-9D73-4B29-8E72-2C77242C4613}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7D5E97E4-9D73-4B29-8E72-2C77242C4613}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7D5E97E4-9D73-4B29-8E72-2C77242C4613}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7D5E97E4-9D73-4B29-8E72-2C77242C4613}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A807C4E1-E04B-4608-9511-56473340E01F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A807C4E1-E04B-4608-9511-56473340E01F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A807C4E1-E04B-4608-9511-56473340E01F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A807C4E1-E04B-4608-9511-56473340E01F}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

diff --git a/Day04_1/Day04_1.csproj b/Day04_1/Day04_1.csproj
@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Remove="input.txt" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Include="input.txt">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Tools\Tools.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/Day04_1/Program.cs b/Day04_1/Program.cs
@@ -0,0 +1,28 @@
+using Tools;
+
+long runningTotal = 0;
+
+var input = InputTools.ReadAllLines();
+foreach(var line in input)
+{
+    var parts = line.Split(':');
+    var numbers = parts[1].Split('|');
+    var pickedNumbers = numbers[0]
+        .Split(' ', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
+        .Select(int.Parse)
+        .ToArray();
+    var ourNumbers = numbers[1]
+        .Split(' ', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
+        .Select(int.Parse)
+        .ToArray();
+
+    var matchCount = pickedNumbers.Intersect(ourNumbers).Count();
+    if (matchCount == 0)
+    {
+        continue;
+    }
+
+    runningTotal += (1 << (matchCount - 1));
+}
+
+Console.WriteLine(runningTotal);
diff --git a/Day04_1/Properties/launchSettings.json b/Day04_1/Properties/launchSettings.json
@@ -0,0 +1,7 @@
+{
+  "profiles": {
+    "Run": {
+      "commandName": "Project",
+    }
+  }
+}