#include <bits/stdc++.h>
using namespace std;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int n;
    cin >> n;

    vector <int> freq(n+1);
    for(int i = 1; i<=n; ++i){
        int x;
        cin >> x;
        freq[x]++;
    }

    vector <int> V;
    for(int i = 1; i<=n; ++i){
        if(freq[i]) V.push_back(freq[i]);
    }

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

    deque <int> D;
    for(auto p: V){
        D.push_back(p);
    }

    int res = 0;

    while(!D.empty()){
        int act = 0;
        while(D.size() > 1){
            if(act + D.front() < D.back()){
                act += D.front();
                D.pop_front();
            }else{
                D.front() -= D.back() - act - 1;
                break;
            }
        }

        D.pop_back();
        res++;
    }

    cout << res << "\n";
}