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#include <stdio.h>
#include <time.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <map> 
#include <string>
#include <vector>  
#include <iostream> 
#include <sstream> 
#include <queue>
#include <algorithm>
#include <assert.h>


using namespace std;

#define ll long long
#define PB 		push_back
#define FOR(a,start,end) 	for(int a=int(start); a<int(end); a++)
#define INF 		INT_MAX
#define SORT(a) 	sort(a.begin(),a.end()) 
#define CL(a,x) 		memset(a,x,sizeof(a))
#define REP(a,x)	for(int a=0;a<x;a++)
#define REP1(a,x)	for(int a=1;a<=x;a++)
#define MP 		make_pair



typedef vector<ll>     vi;
typedef pair<ll, ll>     pii;
typedef vector<string> vs;
typedef vector<pii> vii;
typedef vector<vector<ll> > vvi;
typedef vector<vector<string> > vvs;
typedef vector<pair<string, string> > vss;
typedef pair<string, string> pss;
typedef pair<ll, pii> ppii;
typedef vector<ppii> vppii;
typedef vector<vector<pii> > vvii;
typedef vector<vvi> vvvi;


ll  n, k, q, d, r, g, b, z, p, a, c;

string wa;
vi vk, va, vb;

int main() {
	//freopen("c:\\wojtek\\uva\\pa\\debug\\t1.in", "rt", stdin);
	//d = 1000000007;
	std::ios_base::sync_with_stdio(false);
	std::cin.tie(NULL);
	//	while (1) {
	cin >> n;
	va.assign(n+1, 0);
	
	for (int i = 0; i < n; i++) {
		cin >> c;
		va[c]++;
	}
	vb.clear();
	for (int i = n; i >= 1; i--) {
		if (va[i] > 0)
			vb.push_back(va[i]);
	}
	SORT(vb);
	a = 0;
	int i = vb.size() - 1;
	int j = 0;
	while (i >= j) {
		if (i == j) {
			a++;
			i--;
			j++;
		}
		else {
			while (vb[i] > 0) {
				if (vb[j] < vb[i]) {
					vb[i] -= vb[j++];
				}
				else {
					vb[j] -= vb[i] - 1;
					vb[i] = 1;
					if (vb[j] == 0)
						j++;
				}
				if (vb[i] == 1) {
					i--;
					a++;
					break;
				}
			}
		}
	}

	cout << a << '\n';



	//}

	return 0;

}