#include <iostream>
using namespace std;

int main(){
    int a[100],i,n,c = 0;
    cin>>n;
    for(i = 0;i < n;i++){
    	cin>>a[i];
    	if(a[i] >= 90){
    		c++;
		}
	}
	
	cout<<c<<endl;
}


/**************************************************************
	Problem: 1423
	User: admin
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/