import java.util.*;

public class Exercise38{
  public static void main (String[] args){

    Scanner sc = new Scanner(System.in);

    int num = sc.nextInt();
    ArrayList<Integer> array = new ArrayList<Integer>();

    for (int n = 0; n < num; n++){
      array.add(sc.nextInt());
    }

    int count = 0;

    for (int n = 1; n < array.size(); n++){
      if (array.get(n - 1) > array.get(n)){
        count++;
        int x = array.get(n);
        array.remove(n);
        array.add(0, x);
      }
    }
    System.out.println(count);
  }
}