import java.util.Scanner;

public class Main{

    public static void main(String[] args){

        Scanner sc= new Scanner(system.in);

        int n= sc.nextInt();

        int []arr= new int[n];

        for(int i=0;i<arr.length;i++){

            arr[i]=sc.nextInt();

        }

        for(int i=0;i<arr.length;i++){

            for(int j=i+1;j<arr.length;j++){

                if(arr[i] != arr[j]){

                    System.out.println(arr[i]);

                }

            }

        }

    }