**大佬们 我这萌新一枚 确实没看出来那有问题啊 **

#include<iostream>
using namespace std;

int main()
{
	int n, s, j,mi=999999;
	cin >> n;
	for (int i = 1; i < 4; ++i)
	{
		cin >> s >> j;
		int a = 0;
		if(n%s!=0)
		    a = ((n / s) + 1) * j;
		else if(n%s==0)
			a = ((n / s) ) * j;

		mi = min(a,mi);
	}
	cout << mi << endl;
	

	return 0;
}