# -*- coding:utf-8 -*-
from collections import Counter

if __name__ == "__main__":
	n = input()
	nums = map(int,raw_input().split())
	count = Counter(nums)
	ans = 0
	for i, cnt in count.most_common()[::-1]:
		if cnt == 1:
			ans += 1
		else:
			break
	print ans