#include <iostream> #include <algorithm> using namespace std; int main(){ int a[8]={0}; int i,ans=0; for(i=1;i<=7;i++) cin>>a[i]; if(a[1]!=0){ i=7; while(a[i]==0) i--; if(i==1){ cout<<1<<endl; return 0; }else ans+=a[1]*(1+i); }for(int j=2;j<=7;j++){ ans+=a[j]*j; }cout<<ans<<endl; return 0; }