#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a[10],n,b=0;
	for(int i=0;i<=9;i++){
		cin>>a[i];
	}
	cin>>n;
	for(int q=0;q<=9;q++){
		if((n+30)>=a[q])
		b++;
	}
	cout<<b;		
	return 0;
}
/**************************************************************
	Problem: 1388
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/