题解 | #小乐乐算多少人被请家长#

#include <stdio.h>

int main() {
    // 记录班级的人数
    int n = 0;
    // 三科的成绩
    int math_score = 0;
    int chin_score = 0;
    int eng_score = 0;
    // 记录请家长的人数
    int count = 0;
    
    while (~scanf("%d", &n))
    {
        for (int i = 1; i <= n; i++)
        {
            scanf("%d %d %d", &math_score, &eng_score, &chin_score);
            if ((math_score + eng_score + chin_score) / 3 < 60)
            {
                count++;
            }
        }
    }
    printf("%d\n", count);

    return 0;
}