#include <stdio.h>
#include <stdlib.h>

int main() {
    int n;

    scanf("%d",&n);

    if (n < 0) {
        printf("Invalid input.\n");
        return 0;
    }

    int arr; // Declare array based on input size n

    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    for (int i = 0; i < n; i++) {
        int isDuplicate = 0;
        for (int j = 0; j < i; j++) {
            if (arr[i] == arr[j]) {
                isDuplicate = 1;
                break;
            }
        }
        if (!isDuplicate) {
            printf("%d", arr[i]);
            // A more robust way to handle spaces for unique elements
            // Check if there are more unique elements to print after the current one
            int hasMoreUnique = 0;
            for (int k = i + 1; k < n; k++) {
                int isKDuplicate = 0;
                for (int l = 0; l <= i; l++) {
                    if (arr[k] == arr[l]) {
                        isKDuplicate = 1;
                        break;
                    }
                }
                if (!isKDuplicate) {
                    hasMoreUnique = 1;
                    break;
                }
            }
            if (hasMoreUnique) {
                printf(" ");
            }
        }
    }
    printf("\n");

    return 0;
}