A. Team

#include <stdio.h>

int main() {
int n;
if (scanf("%d", &n) != 1 || n < 1 || n > 1000) {
return 1;
}

int count = 0;

for (int i = 0; i < n; i++) {
    int k, h, r;
    if (scanf("%d %d %d", &k, &h, &r) != 3) {
        return 1;
    }
    if ((k < 0 || k > 1) || (h < 0 || h > 1) || (r < 0 || r > 1)) {
        return 1;
    }
    int sure = k + h + r;
    if (sure >= 2) {
        count++;
    }
}

printf("%d\n", count);

return 0;

}