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