#include <bits/stdc++.h>
using namespace std;
int main() {
    int i,n,h=0;
    int a[10];
    for(i=0;i<10;i++){
        cin>>a[i];
    } 
    cin>>n;
    for(i=0;i<10;i++){
        if(n+30>=a[i]){
            h++;    
        }
    }
    cout<<h;
}
/**************************************************************
	Problem: 1388
	User: linweilun
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/