UVa-Ecological Premium

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