04b

Sources/aoc2021/04.swift

@@ -23,17 +23,20 @@ struct Board {
     }
     
     mutating func checkHasWon() -> Bool {
-        //print("HasWon?: \(numbers)")
-        let foundInRows = numbers.contains { row in
+        var found = false
+        defer {
+            hasWon = hasWon || found
+        }
+        found = numbers.contains { row in
             row.allSatisfy { $0 == nil }
         }
-        if foundInRows {
+        if found {
             return true
         }
-        let foundInColumns = numbers.indices.contains { columnIndex in
-            return numbers.allSatisfy { $0[columnIndex] == nil }
+        found = numbers.indices.contains { columnIndex in
+            numbers.allSatisfy { $0[columnIndex] == nil }
         }
-        hasWon = foundInColumns
+        hasWon = found
         return hasWon
     }
     
@@ -72,9 +75,7 @@ struct Day04 {
     
     func runA(boards: inout [Board], inputNumbers: [Int]) {
         for inputNumber in inputNumbers {
-            //print("\nInput: \(inputNumber)")
             for (idx, var board) in boards.enumerated() {
-                //print("Checking board: \(idx)")
                 if board.crossOf(num: inputNumber) && board.checkHasWon() {
                     print(board.calculateScore() * inputNumber)
                     return
@@ -85,11 +86,13 @@ struct Day04 {
     }
     
     func runB(boards: inout [Board], inputNumbers: [Int]) {
+        var countWon = 0
         for inputNumber in inputNumbers {
-            //print("\nInput: \(inputNumber)")
             for (idx, var board) in boards.enumerated() {
-                //print("Checking board: \(idx)")
-                if !board.hasWon && board.crossOf(num: inputNumber) && board.checkHasWon() {
+                if board.crossOf(num: inputNumber) && !board.hasWon && board.checkHasWon() {
+                    countWon += 1
+                }
+                if countWon == boards.count {
                     print(board.calculateScore() * inputNumber)
                     return
                 }

Sources/aoc2021/Resources/input/04.txt

@@ -1,19 +1,601 @@
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