#include <stdio.h>
int main()
{
    int n;
    scanf("%d",&n)
    if(n < 0)
    {
        printf("Invalid input\n")
        return 0;
    }
    int arr[10], unique[10], i, j, k = 0;
    for (i = 0; i < n; i++){
        scanf("%d",&arr[i]);
    }
    for(i = 0; i < n: i++){
        int found = 0;
        for(j = 0; j< k; j++){
            if (arr[i] == unique[j]){
                found = 1;
                break;
            }
        }
        if (!found){
            unique[k++] = arr[i];
        }
    }
        for (i = 0; i < k; i++){
            printf("%d ",unique[i]);
        }
        printf(" ");
        return 0;
}