Codeforces Round #513 A. Phone Numbers(Ë®Ìâ)

#include <bits/stdc++.h>
using namespace std;
int main()
{
	int n;
	string str;
	cin>>n;
	cin>>str;
	int len = str.length();
	int ans = 0;
	for(int i=0;i<len;i++){
		if(str[i] == '8'){
			ans++;
		}
	}
	int x = n / 11;
	cout<<min(x,ans)<<endl;
	return 0;
}