#include<iostream> using namespace std; int main() { double a[]={0,28.9,32.7,45.6,78,35,86.2,27.8,43,56,65},sum=0; int num,i; for(i=1; i<=10;i++) { scanf("%d",&num); sum=sum+num*a[i]; } printf("%.1lf",sum); return 0; }