萌新妹子刚学OI，ZJ初一求调代码

#include <iostream>
using namespace std;
int main(){
    int t;
    cin>>t;
    for(int i=1;i<=t;i++){
        int a,b,x,y;
        cin>>a>>b>>x>>y;
        if(x>2*y)x=2*y;
        cout<<(min(((a/2)*x+(y),(b/2)*x+y))<<endl;   
    }
    return 0;
}