Reorganised packages

Sources/04/04.swift

@@ -0,0 +1,91 @@
+//
+//  File.swift
+//  
+//
+//  Created by Max Nuding on 04.12.21.
+//
+
+import Foundation
+import Runner
+
+struct Board {
+    var numbers: [[Int?]]
+    var hasWon = false
+    
+    mutating func crossOf(num: Int) -> Bool {
+        for (rowNumber, row) in numbers.enumerated() {
+            if let colNumber = row.firstIndex(of: num) {
+                numbers[rowNumber][colNumber] = nil
+                //print("Found at: \(rowNumber),\(colNumber)")
+                return true
+            }
+        }
+        return false
+    }
+    
+    mutating func checkHasWon() -> Bool {
+        var found = false
+        defer {
+            hasWon = hasWon || found
+        }
+        found = numbers.contains { row in
+            row.allSatisfy { $0 == nil }
+        }
+        if found {
+            return true
+        }
+        found = numbers.indices.contains { columnIndex in
+            numbers.allSatisfy { $0[columnIndex] == nil }
+        }
+        hasWon = found
+        return hasWon
+    }
+    
+    func calculateScore() -> Int {
+        numbers
+            .reduce([], +)
+            .compactMap { $0 }
+            .reduce(0, +)
+    }
+}
+
+struct Day04: Runnable {
+    let inputPath: String
+    
+    func run() {
+        let input = try! String(contentsOfFile: inputPath)
+        var lines = input
+            .components(separatedBy: .newlines)
+        let inputNumbers = lines
+            .removeFirst()
+            .split(separator: ",")
+            .map { Int($0)! }
+        _ = lines.removeFirst() //empty seperator line
+        
+        var boards = lines
+            .split(separator: "")
+            .map { boardLines in
+                Board(numbers: boardLines.map { $0.split(separator: " ").map { num in Int(num)! } })
+            }
+        run(boards: &boards, inputNumbers: inputNumbers)
+    }
+    
+    func run(boards: inout [Board], inputNumbers: [Int]) {
+        var countWon = 0
+        for inputNumber in inputNumbers {
+            for (idx, var board) in boards.enumerated() {
+                if board.crossOf(num: inputNumber) && !board.hasWon && board.checkHasWon() {
+                    if countWon == 0 {
+                        print(board.calculateScore() * inputNumber)
+                    }
+                    countWon += 1
+                }
+                if countWon == boards.count {
+                    print(board.calculateScore() * inputNumber)
+                    return
+                }
+                boards[idx] = board
+            }
+        }
+    }
+}

Sources/04/main.swift

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+//
+//  File.swift
+//
+//
+//  Created by Max Nuding on 05.12.21.
+//
+
+import Foundation
+import Runner
+
+Runner(target: Day04.self, day: "04").run()