07a

Package.swift

@@ -15,7 +15,8 @@ let package = Package(
             .executable(name: "03", targets: ["03"]),
             .executable(name: "04", targets: ["04"]),
             .executable(name: "05", targets: ["05"]),
-            .executable(name: "06", targets: ["06"])
+            .executable(name: "06", targets: ["06"]),
+            .executable(name: "07", targets: ["07"])
         ],
     dependencies: [
         // Dependencies declare other packages that this package depends on.
@@ -63,6 +64,10 @@ let package = Package(
         .executableTarget(
             name: "06",
             dependencies: [.targetItem(name: "Runner", condition: nil)]
+        ),
+        .executableTarget(
+            name: "07",
+            dependencies: [.targetItem(name: "Runner", condition: nil)]
         )
     ]
 )

Sources/07/07.swift

@@ -0,0 +1,29 @@
+//
+//  File.swift
+//
+//
+//  Created by Max Nuding on 05.12.21.
+//
+
+import Foundation
+import Runner
+
+struct Day07: Runnable {
+    let inputPath: String
+    
+    func run() {
+        let input = try! String(contentsOfFile: inputPath)
+        let horizontalPositions = input
+            .trimmingCharacters(in: .newlines)
+            .components(separatedBy: ",")
+            .map { Int($0)! }
+        run(horizontalPositions: horizontalPositions)
+    }
+    
+    func run(horizontalPositions: [Int]) {
+        let median = horizontalPositions.sorted()[horizontalPositions.count / 2]
+        let distancesToMedian = horizontalPositions.map { abs(median - $0) }
+        let toalFuel = distancesToMedian.reduce(0,+)
+        print(toalFuel)
+    }
+}

Sources/07/main.swift

@@ -0,0 +1,11 @@
+//
+//  File.swift
+//  
+//
+//  Created by Max Nuding on 05.12.21.
+//
+
+import Foundation
+import Runner
+
+Runner(target: Day07.self, day: "07", isTest: false).run()

Sources/Runner/Resources/input/07_test.txt

@@ -0,0 +1 @@
+16,1,2,0,4,2,7,1,2,14