题解 | #小乐乐算多少人被请家长#

#include <stdio.h>

int main() {
   int a,b,c,n,count = 0,sum,average;
   scanf("%d",&n);
   for(int i = 0;i<n;i++)
   {
      scanf("%d%d%d",&a,&b,&c);
      sum = a+b+c;
      average = sum/3;
      if(average<60)
      count++;
   }
   printf("%d",count);
}