#include<bits/stdc++.h>
using namespace std;
int a[11],n,s;
int main(){
	//freopen("b.in","r",stdin);
	//freopen("b.out","w",stdout);
	for(int i=1;i<=10;i++){
		cin>>a[i];
		a[i]-=30;
	}
	cin>>n;
	for(int i=1;i<=10;i++){
		if(a[i]<=n){
			s++;
		}
	}
	cout<<s;
	//fclose(stdin);fclose(stdout);
	return 0;
}

好像没问题？？？