#include<bits/stdc++.h>
using namespace std;
double a1,a2,a3,a4,a5,a6,a7,a8,a9,a10;
double sum=0;
int main(){
	cin>>a1>>a2>>a3>>a4>>a5>>a6>>a7>>a8>>a9>>a10;
	sum=a1*28.9+a2*32.7+a3*45.6+a4*78+a5*35+a6*86.2+a7*27.8+a8*43+a9*56+a10*65;
	cout<<fixed<<setprecision(1)<<sum<<endl;
	return 0;
}

朴实无华

#include<bits/stdc++.h>
using namespace std;
double f=0,b[15]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};
int a[15];
int main(){
    for(int i=0;i<10;i++){
    	cin>>a[i];
    	f+=a[i]*b[i];
	}
    cout<<f<<"\n";
    return 0;
}
//shortest code ever

#include<bits/stdc++.h>
#include<string>
using namespace std;
int main(){
    int n=10;
    double f=0,b[10]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};
    const int N=n;
    int a[N];
    for(int i=0;i<N;i++) cin>>a[i];
    for(int k=0;k<N;k++) f+=a[k]*b[k];
    cout<<f;
    return 0;
}

#include <iostream>
using namespace std;
int main(){
	double a , b , c , d , e , f , g , h , i , j;
	cin >> a >> b >> c >> d >> e >> f >> g >> h >> i >> j;
	a = 28.9 * a;
	b = 32.7 * b;
	c = c * 45.6;
	d = d * 78;
	e = e * 35;
	f = f * 86.2;
	g = g * 27.8;
	h = h * 43;
	i = i * 56;
	j = j * 65;
	double y = a + b + c + d + e+ f+g +h+i+j;
	printf("%.1lf" , y);
	return 0;
}

#include<bits/stdc++.h> #include using namespace std; int main(){ int n=10; double f=0; const int N=n; int a[N]; double b[10]={28.9,32.7,45.6,78,35,86.2,27.8,43,56,65};

for(int i=0;i<N;i++){
	cin>>a[i];

} for(int k=0;k<N;k++){ f+=a[k]*b[k]; } cout<<f;

return 0;

}

#include<bits/stdc++.h> using namespace std;

int main(){ double a1,a2,a3,a4,a5,a6,a7,a8,a9,a0,s=0; cin>>a1>>a2>>a3>>a4>>a5>>a6>>a7>>a8>>a9>>a0; s=a128.9+a232.7+a345.6+a478+a535+a686.2+a727.8+a843+a956+a065; printf("%.1f",s);

}