#include <stdio.h>

int exists(int arr[], int size, int num) {
	int i;
	for (i = 0; i < size; ++i) if (arr[i] == num) return 1;
	return 0;
}

int main(void) {
	int size, i, len = 0;
	scanf("%d", &size);
	int array[size], dups[size];
	for (i = 0; i < size; ++i) {
		scanf("%d", &array[i]);
		if (exists(array, i, array[i]) && !exists(dups, len, array[i]))
			printf("%d ", dups[len++] = array[i]);
	}
	return 0;
}