/*
 * ????????.cpp
 *
 *  Created on: 2012-10-31
 *      Author: ??
 */
int main() {
	int n, s = 1, j, i;//n:??s:??????i.j:????
	cin >> n;
	int a[n], b[n];//?????
	for (int i = 0; i < n; i++)
		cin >> a[i];//????
	b[0] = a[0];
	for (i = 1; i < n; i++) {//??????
		for (j = 0; j < s; j++) {
			if (a[i] == b[j]) {//?????????????
				break;
			}
		}
		if (j == s) {//??????????
			b[s] = a[i];
			s++;
		}
	}
	for (int i = 0; i < s - 1; i++)//??
		cout << b[i] << ' ';
	cout << b[s - 1];
	return 0;
}
