#include<bits/stdc++.h>
using namespace std;
#define int long long
int n;
int a[100100];
int ans;
signed main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>a[i];
		if(a[i]>a[i-1])ans++;
	}
	cout<<ans;
	return 0;
}