ol_4_09

#include <iostream>
#include <fstream>

using namespace std;

int main()
{

    ifstream cin("input.txt");
    short n;
    cin>>n;

    long pre = 0;
    short i;
    for(i = 0; i < n; i++)
    {
        long cur;
        cin>>cur;
        if (cur <= pre)
            break;
        pre=cur;
    }
    cout<<i;
}