(UVA)10300-農場

#include<stdio.h>
int main(){
 int n;
 while ((scanf("%d", &n)) != EOF){
             while (n--){
   int sum = 0, i, j;

       scanf("%d", &i);
    for (j = 0; j < i; j++)
    {
    int a, b, c;
    scanf("%d%d%d", &a, &b, &c);
    sum = sum + a*c;
    }
   printf("%d\n", sum);
  }

 }
 return 0;
}