#include<cmath>
#include<iostream>
using namespace std;
int n, a, a1, b, b1, c, c1, ans;
int main()
{
	freopen("pencil.in", "r", stdin);
	freopen("pencil.out", "w", stdout);
	cin >> n >> a >> a1 >> b >> b1 >> c >> c1;
	ans = min(ceil(n * 1.0 / a) * a1, min(ceil(n * 1.0 / b) * b1, ceil(n * 1.0 / c) * c1));
	cout << ans;
	return 0;
}

这东西在c++上没问题，在老师的编译器上为什么会RE啊？