#include<iostream>
using namespace std;
int main()
{
    int a[10];
    for (int i=0;i<10;i++) cin>>a[i];
    int h,t(0);
    cin>>h;
    for (int i=0;i<10;i++)
        h+30>=a[i]?t++:t;
    cout<<t<<endl;
    return 0;
}
/**************************************************************
	Problem: 2252
	User: admin
	Language: C++
	Result: Accepted
	Time:48 ms
	Memory:2072 kb
****************************************************************/