#include<iostream>
using namespace std;
int main()
{
	int N = 0;
	cin >> N;
	int arr[10000];
	for (int a = 0;a <= N - 1;a++) {
		cin >> arr[a];
	}
	int i = 0;
	int j = 9999;
	int sum = 0;
	int n;
	n = N - 1;
	while (arr[i] != 0 && arr[n] != 0 && i < n)
	{
		while (arr[i] != 0 && arr[n] != 0 && i < n&&arr[i] > arr[n])
		{
			sum++;
			i++;
		}
		i = 0;
		n--;
	}
	cout << sum << endl;
}