12a

Sources/11/11.swift

@@ -49,14 +49,14 @@ class Day11: Runnable {
             .map { Array($0) }
             .map { ar in ar.map {c in Int(c.description)!} }
          
-        for _ in 0..<100 {
+        var step = 0
+        while(flashed.count < numRows * numCols) {
             flashed = Set<Coord>()
             for row in octopuses.indices {
                 for col in octopuses[row].indices {
                     octopuses[row][col] += 1
                 }
             }
-            
             for row in octopuses.indices {
                 for col in octopuses[row].indices {
                     let coord = Coord(row: row, col: col)
@@ -66,8 +66,12 @@ class Day11: Runnable {
             for flash in flashed {
                 octopuses[flash] = 0
             }
+            step += 1
+            if step == 100 {
+                print(numFlashes)
+            }
         }
-        print(numFlashes)
+        print("All flashing at step: \(step)")
     }
     
     func checkAndFlash(at coord: Coord) {