#include <stdio.h>
int a[1000005];

int main () {
	int n, count = 0;

	scanf("%d", &n);
	for (int i = 0; i < n; i++) {
		scanf("%d", &a[i]);
	}

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			if (a[i] == a[j]) {
				count++;
			}
		}
		if (count == 1) {
			printf("%d ", a[i]);
		}
		count = 0;
	}
	return 0;
}