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