题解 | 小乐乐算多少人被请家长

#include <stdio.h>

int main() {
    int n, a, b, c = 0;
    double average = 0;
    int count = 0;
    scanf("%d",&n);
    while (scanf("%d %d %d",&a,&b,&c) != EOF) {
        average = (a + b +c) * 1.0 / 3;
        if (average < 60) {
            count++;
        }
    }
    printf("%d\n",count);
    return 0;
}