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;
}