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