80pts

#include <iostream> // 别问我为什么不用万能头。
#include <algorithm>
#include <cstring>

using namespace std;

#define MAXN 100000

long long vis[MAXN+5];


int main () {
	int n;
	cin >> n;
	for (int i = 1; i <= n; i++) {
		int a;
		cin >> a;
		vis[a]++;
	}
	long long ans = 0;
	for (int i = 2; i <= MAXN; i++) {
		if (vis[i] > ans) {
			ans = vis[i];
		} else {
			ans = vis[i] + (ans-vis[i]);
		}
	}
	cout << ans << endl;
	return 0;
}