#include<bits/stdc++.h>
using namespace std;

int main(){
	int n;
	int a, b;
	int count = 0;
	cin >> n >> a;
	for(int i = 0; i < n-1; i++){
		cin >> b;
		if(a > b){
			count++;
		}else{
			a = b;
		}
	}
	cout << count << endl;
}