Finished part 2 day 4 lightning quick

advent_of_code/d4/main.cpp

@@ -127,16 +127,57 @@ int main(){
         bingo_cards.push_back(card);
     }
 
+    bool found_result = false;
+
+    cout << "Best board score:" << endl;
     for(auto n : calls){
         for(auto& board: bingo_cards){
             bool r = board.call(n);
             if(r){
                 cout << n << " * " << board.score() << " = " << n * board.score() << '\n';
-                return 0;
+                found_result = true;
+                break;
             }
         }
+        if(found_result) break;
     }
 
+    // Now for part 2, find the worst board. So we go through all boards and see when they finish
+    // Reset all boards first
+    // Then go through all boards and do all calls on them and keep track of the #numbers needed
+
+    int worst_board = 0, calls_needed_worst_board = 0, current_board = 0;
+
+    for(auto& b : bingo_cards){
+        for(int y = 0; y < 5; ++y){
+            b.opens[y].fill(true);
+        }
+
+        int calls_needed = 0;
+
+        for(auto c : calls){
+            bool call_result = b.call(c);
+
+            if(call_result){
+                if(calls_needed_worst_board < calls_needed){
+                    worst_board = current_board;
+                    calls_needed_worst_board = calls_needed;
+                }
+
+                break;
+            }
+            calls_needed++;
+        }
+
+        current_board++;
+    }
+
+    int last_call = calls[calls_needed_worst_board];
+    int worst_board_score = bingo_cards[worst_board].score();
+
+    cout << "Worst board:" << endl;
+    cout << last_call << " * " << worst_board_score << " = " << last_call * worst_board_score << endl;
+
     cout << flush;
 
     file_stream.close();