#include<bits/stdc++.h> using namespace std; int main (){ int sum = 0,a[10001]; for(int i = 1;i <= 7;i++) { cin >> a[i]; } if(a[1] !=0) { int i = 7; while(a[i] == 0)i--; sum+=a[1]*(1+i); } for(int i = 2;i <= 7;i++) { sum += a[i]*i; } cout<<sum; return 0; }