@2-1 safety index predicted by CCF at the end of December 1, 2020

Title Description

Examples

Source code

#include<iostream>
using namespace std;
int main()
{
    
	int n, h, k;
	int sum = 0;
	int y;
	cin >> n;
	while (n--)
	{
    
		cin >> h >> k;
		sum += h * k;
	}
	y = max(0, sum);
	cout << y << endl;
	return 0;
}

About this problem

In fact, it is to multiply and add the numbers set in each group Last sum 0 Compare the size Then the output