#include <iostream>
#include <vector>

using namespace std;

int main() {
    int n;
    cin >> n;

    vector<int> A(n);
    for (int& item : A) {
    	cin >> item;
    }
    
    int ans = 0;

    for (int i = 1; i < n; i = i + 1) {
    	if (A[i] > A[i - 1]) {
    		ans = ans + 1;
    	}          
    }
	
	cout << ans;
    return 0;
}