#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c,d,e,f,g,h,i,j;
    cin>>a>>b>>c>>d>>e>>f>>g>>h>>i>>j;
    int z;
    cin>>z;
    int y=0;
    if(30+z>=a){
        y++;
    }
    if(30+z>=b){
        y++;
    }
    if(30+z>=c){
        y++;
    }
    if(30+z>=d){
        y++;
    }
    if(30+z>=e){
        y++;
    }
    if(30+z>=f){
        y++;
    }
    if(30+z>=g){
        y++;
    }
    if(30+z>=h){
        y++;
    }
    if(30+z>=i){
        y++;
    }
    if(30+z>=j){
        y++;
    }
    cout<<y;
	return 0;
}