uva oj 10300

#include <iostream>using namespace std;int main(){    long n;    cin >> n;    while(n--)    {        long t,sum = 0;        cin >> t;        while(t--)        {            int a,b,c;            cin >>a>>b>>c;            sum += a*c;        }        cout<<sum<<endl;    }    return 0;}