#include <iostream>
using namespace std;
int main() {
int n, a, b, c, d, e;
cin >> n >> a >> b >> c >> d >> e;
int t = 2*a;
if (n >= 2 * c)
t= min(t, 2*b);
if (n >= 2 * e)
t= min(t, 2*d);
cout << t << endl;
return 0;
}
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