#include <iostream>
#include<vector>
#include<algorithm>

using namespace std;

int main()
{

	int n, a;
	cin >> n;

	vector<int> nums(n, 0);

	for (int i = 0; i < n; i++) {
		cin >> a;
		nums[a-1]++;
	}

	sort(nums.begin(), nums.end());

	int sum = 0;
	int ans = 0;
	int i = n-1;
	while (sum < n) {
		sum += nums[i]*2-1;
		ans++;
		i--;
	}
	cout << ans;
	return 0;
}