#include<stdio.h>
int main()
{
    int n;
    scanf("%d", &n);
    if (n < 0) {
        printf("Invalid input");
        return 0;
    }
    int arr[n], results[n];
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }
    int k = 0;
    for (int i = 0; i < n; i++) {
        int isDuplicate = 0;
        for (int j = 0; j < k; j++) {
            if (arr[i] == result[j]) {
                isDuplicate = 1;
                break;
            }
        }
        if (!isDuplicate) {
            result[k++] = arr[i];
        }
    }
    return 0;
}