c++

#include<bits/stdc++.h>
using namespace std;
int main()
{
	double a[10]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65}; 
	double x,s=0;
	for(int i=0;i<10;i++) 
	{
		cin>>x;  
		s+=a[i]*x;
	}
	printf("%.1lf\n",s); 
	return 0;
}