#include<iostream>
using namespace std;
const int N = 100010;
int a[N];

int main()
{
	int H,n=0,i;
	for(i=1;i<=10;i++) 
	scanf("%d",& a[i]);
	scanf("%d",&H);
	while(i--)
	{
		if(H+30>=a[i])
		n++;
	}
	printf("%d",n);
	return 0;
 } 
``