package com.company;

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
	// write your code here
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int[] s=new int[n];
        int i,e,count;
        for (i=0;i<n;i++){
            s[i]=sc.nextInt();
        }
        //i是距離
        for(e=1;e<=n;e++){
            count=0;
            for (i=0;i<n;i++){
                if (s[i]>e){
                    count++;
                }
            }
            if (count==e){
                System.out.println(count);
            }
        }

    }
}