#include<bits/stdc++.h> using namespace std; int main(){ int m,a[11],k,n,t = 0; for(int i =1;i <=10;i++){ cin>>a[i]; } cin>>k; for(int i=1;i<=10;i++ ){ if(k+30>=a[i]) t++; } cout<<t; return 0; }