秒了

#include <iostream>
using namespace std;
int main(){
	int a, b, c, d;
	int A, B, C, D;
	cin >> a >> b >> c >> d;
	cin >> A >> B >> C >> D;
	int sum = A * a + B * b;
	sum = sum + C * c + D * d;
	cout << sum << endl;
}

C :

#include<stdio.h>
int main(){
	int i,j,k,h;
	int a,b,c,d;
	scanf("%d %d %d %d",&i,&j,&k,&h);
	scanf("%d %d %d %d",&a,&b,&c,&d);
	int sum=a*i+b*j+c*k+d*h;
	printf("%d\n",sum);
	return 0;
}

C++ :

#include<bits/stdc++.h>
using namespace std;
int a,b,c,d,a1,b1,c1,d1;
int main()
{
	cin>>a>>b>>c>>d>>a1>>b1>>c1>>d1;
	cout<<a*a1+b*b1+c*c1+d*d1;
   return 0;
}