CSP-202012-1-期末预测之安全指数

解题代码

#include <iostream>
#include <algorithm>
using namespace std;

int n, sum;

int main() {
    cin >> n;
	for (int i = 0; i < n; i++)
	{
		int w, s;
		cin >> w >> s;
		sum += w * s;
	}
	sum = max(sum, 0);
	cout << sum;
    return 0;
}