文件目录

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