#include<stdio.h>
#include<iostream>
#include<cstdio>
using namespace std;
int main()
{	int x[10];
	int y,i,k=0;
	for (i=1;i<=10;i++)
	cin >> x[i];
	
	cin >> y;
	for (i=1;i<=10;i++)	
	if (x[i]<=y+30) k++;
	
	cout << k;
	return 0;
}