UVA 10300 Ecological Premium

#include <cstdio>int main() {int t;scanf("%d", &t);while (t--) {int n;scanf("%d", &n);long long sum = 0;while (n--) {int a, b, c;scanf("%d%d%d", &a, &b, &c);sum += a * c;}printf("%lld\n", sum);}return 0;}