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