uva oj 10300

#include<cstdio>#include<iostream>using namespace std;int main(){    int T,i,n,a,b,c,sum;    scanf("%d",&T);    while(T--)    {        scanf("%d",&n);        sum=0;        for(i=0;i<n;i++)        {            scanf("%d%d%d",&a,&b,&c);            sum+=a*c;        }        printf("%d\n",sum);    }    return 0;}