#include <bits/stdc++.h> using namespace std;

int main() { long long l, k, j, s, n, x, y, q, w, e, r; cin >> n >> x >> y >> q >> w >> e >> r; l = 4LL * (n / 10) * x; k = 1LL * (n / 2) * y; j = 1LL * n * (q + w + e + r); s = max( max(l, k), j); cout << s << endl; return 0; }