import java.util.Scanner;

class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int a[] = new int[10005];
        for (int i = 0; i < n; i++) {
            int x = sc.nextInt();
            a[x] = 1;
        }
        for (int i = 0; i < 1005; i++) {
            if(a[i]==1){
                System.out.print(i+" ");
            }
        }
    }
}