CSP-202012-1-期末预测之安全指数

• 题目很简单，直接上代码

#include <iostream>
using namespace std;
int main() {int n, sum = 0;cin >> n;for (int i = 0; i < n; i++){int w, score;cin >> w >> score;sum += w * score;}if (sum > 0) cout << sum;else cout << "0";return 0;
}