#include <cstdio>
#include <iostream>
#include <bits/stdc++.h>
using namespace std;
int a[15];
int main()
{
int n,b,num = 0;
for(int i = 1;i <= 10;i++)
cin>>a[i];
cin>>n;
b = n + 30;
for(int i = 1;i <= 10;i++)
{
if(b >= a[i])
num = num+ 1;
}
printf("%d",num);
}