#include <iostream>
#include <stdio.h>

using namespace std;

int a[1000000];
int main(){
	int count = 0, n;
	bool check = false;
	cout << "Vvedite razmernost massiva" << endl;
	cin >> n;
	cout << "Vvedite elementi massiva" << endl;
	for (int q=0; q<n; q++){
		cin >> a[q];
	}
	for (int q=0; q<n-1; q++){
		check = false;
		while (a[q+1] < a[q]){
			check = true;
			q++;
		}
		if (check == true)
			count ++;
	}
	cout << count << endl;
}