#include<bits/stdc++.h>
using namespace std;
int n,a[10000],b,c;
int main(){
    cin>>n;
    a[0]=INT_MAX;
    for(int i=0;i<n;i++){
    	cin>>a[i];
    }
    for(int i=0;i<n;i++){
    	if(a[i]<a[i-1]){
    		b++;
    	}
    }
    cout<<b;
	return 0;
}

/**************************************************************
	Problem: 1795
	User: chenjingqi
	Language: C++
	Result: Wrong Answer
****************************************************************/