---

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int n = scanner.nextInt();
        int[] a = new int[n];

        for (int i = 0; i < n; i++) {
            a[i] = scanner.nextInt();
        }

        for (int i = 0; i < n; i++) {
            int count = 0;

            for (int j = 0; j < n; j++) {
                if (a[i] == a[j]) {
                    count++;
                }
            }

            if (count == 1) {
                System.out.print(a[i] + " ");
            }
        }
    }
}