题解 | #小乐乐算多少人被请家长#

#include<stdio.h>
int main()
{
	int n = 0; 
	int a, b, c = 0; 
	int count = 0;  
	scanf("%d", &n); 
	for (int i = 0; i <n ; i++)
	{
		scanf("%d%d%d", &a, &b, &c); 
		if ((a + b + c) / 3 < 60)
		{
			count++; 
		}
	}
	printf("%d", count);  
	return 0; 
}