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