---

#include <iostream>

using namespace std;

int main()
{
    int n, k = 0, i;
    
    cin >> n;
    int mas[n];
    for (i = 0; i < n; i++)
        cin >> mas[i];
    
    for (i = 1; i < n; i++)
        if (mas[i] > mas[i - 1])
            k++;
    
    cout << k;
}