import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;
import java.math.*;
 
public class Main {
  public static void main(String[] args)throws IOException{
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringBuilder sb = new StringBuilder();
    int n = Integer.parseInt(br.readLine());
    String[] str = br.readLine().split(" ");
    int max = 0;
    int[] a = new int [n];
    for(int i = 0; i < n; i++){
      a[i] = Integer.parseInt(str[i]);
      max = Math.max(max,a[i]);
    }
    int sum = 0;
    int chain = 0;
    for(int i = n-1; i >-1 ; i--){
      if(a[i]==max){
        sum += chain;
        chain = 0;
        max--;
      }else{
        chain++;
      }
    }
    if(chain>0)sum+=chain;
    sb.append(sum);
    System.out.println(sb);
  }
}