#include <bits/stdc++.h> using namespace std; int main() { int a[7]; int p = 0; for(int i = 0; i < 7; ++i){ cin >> a[i]; if(a[i] > 0) p = i; } int s = 0; s += (p + 2) * a[0]; for(int i = 1; i <= 6; ++i) s += (i + 1) * a[i]; cout << s << '\n'; return 0; }