#include <bits/stdc++.h>
using namespace std;
int a[1007];
int main()
{
	int n,num = 0;
	cin >> n;
	for (int i = 1;i <= n;i++)
	{
		cin >> a[i];	
	} 
	for (int i = 1;i <= n;i++)
	{
		int ge = a[i] % 10;
		int shi = a[i] / 10 % 10;
		int bai = a[i] / 100 % 10;
		int qian = a[i] / 1000;
		if(ge - (shi + bai + qian) > 0)
		{
			num++;
		}
	}
	cout << num;
	return 0;
}