#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,i,m=0;
    cin>>n;
    for(i=0,i<=n,i++){
        cin>>i;
    	if(i>=90){
    		m=m++;
    	}
    }
	cout<<m
}
/**************************************************************
	Problem: 1423
	User: chenyaohuo
	Language: C++
	Result: Compile Error
****************************************************************/