#include <stdio.h>
 int main() {
     int n;
     scanf("%d", &n);
     return 0;
 }
 int arr[20]; //array size (safe limit since n <= 10)
 for(int i = 0; i < n; i++){
     scanf("%d", &arr[i]);
 }
 for(int i = 0; i < n; i++){
     int duplicate = 0;
     for (int j = 0; j < i; j++) {
         if (arr[i] == arr[j]) {
             duplicate = 1;
             break;
         }
     }
     if (!duplicate) {
         printf("%d", arr[i]); //print with space
     }
 }