题解 | #小乐乐算多少人被请家长#

#include <stdio.h>

int main() {
    int num;
    int a,b,c;
    int count = 0;
    scanf("%d",&num);
    float aver = 0;
    for(int i = 1; i<= num; i++) {
        scanf("%d %d %d",&a,&b,&c);
        aver = (a+b+c)/3.0;
        if(aver < 60)
        count++;
    }
    printf("%d\n",count);
    return 0;
}