#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 isDuplicate = 0;
        for (int j = 0; j < i; j++) {
            if (arr[i] == arr[j]) {
                isDuplicate = 1;
                break;
            }
        }
        if (!isDuplicate) {
            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; i < n; i++) {
        scanf("%d", &arr[i]);
    }
    removeDuplicate(arr, n);
    return 0;
    
}