//#include "pch.h"
#include <iostream>
#include <vector>
#include <string>
#include <sstream>
using namespace std;

#define ll long long

double sqr(double x) {
	return (x * x);
}

ostream & operator << (ostream & out, vector<ll> & v) {
	for (int i = 0; i < v.size(); i++) {
		out << v[i] << ' ';
	}
	return out;
}


istream & operator >> (istream & in, vector<ll> & v) {
	v.clear();
	string s;
	getline(cin, s);
	istringstream stream(s);
	int a;
	while (stream >> a)
		v.push_back(a);
	return in;

}


pair<ll, ll> maxF(vector<ll> & v) {
	int mx = -10000;
	int k = -1;
	for (int i = 0; i < v.size(); i++) {
		if (v[i] > mx | i == 0) {
			k = i;
			mx = v[i];
		}
	}
	if (k != -1) return make_pair(mx, k);
}

ll findF(vector<ll> &v, ll x) {
	for (ll i = 0; i < v.size(); i++) {
		if (v[i] == x) return i;
	}
	return -1;
}

int main()
{
	/*
	vector < ll > test = {3, 2 ,1};
	cout << maxF(test).first;
	*/
	ll n, mx, mx1, ma, pob, pobpos;
	mx = 5;
	mx1 = 5;
	pob = -1;
	pobpos = -1;
	bool mbx = false;
	vector<ll> m;
	cin >> n;
	for (ll i = 0; i < n; i++) {
		ll x;
		cin >> x;
		if (i == 0 | x > pob) {
			pob = x;
			pobpos = i;
		}
		m.push_back(x);
	}

	for (ll i = pobpos + 1; i < n; i++) {
		ll x;
		x = m[i];
		if (mx1 % 10 == 5 & x < mx1 & (mx1 > mx | !mbx) & i != pobpos + 1) {
			mbx = true;
			mx = mx1;
		}
		mx1 = x;
	}
	if (mbx) {
		ll k = 1;
		for (ll i = 0; i < n; i++) {
			ll x = m[i];
			if (x > mx) {
				k++;
			}
		}
		cout << k;
	}
	else cout << 0;

	return 0;

}