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#pragma GCC optimize("Ofast")
//#pragma GCC target ("avx2")
//#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#include<bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//using namespace __gnu_pbds;
using namespace std;
//typedef tree<pair<int,int>,null_type,less<pair<int,int>>,rb_tree_tag,tree_order_statistics_node_update>ordered_set;
#define ll long long
#define ull unsigned long long int
#define pb push_back
#define mp make_pair
#define vi vector<int>
#define pii pair<int,int>
#define pss pair<short,short>
#define pld pair<long double,long double >
#define ld long double
#define piii  pair<pii,int>
#define vii vector<pair<int,int> >
#define st first
#define nd second
#define pll pair<ll,ll>
#define speed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define M_PI 3.14159265358979323846
//#define int long long
//const int mod=1000000007;
//const int mod=1009;
const int mod=998244353;
const int inf=1000000009;
const long long INF=1000000000000000009;
const long long big=1000000000000000;
const long double eps=0.000000000000000000001;
const int rozmiar=5e5+5;
int cnt[rozmiar],T[rozmiar];
void solve()
{
    int n;
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>T[i];
        cnt[T[i]]++;
    }
    vi W;
    for(int i=1;i<=n;i++){
        if(cnt[i])
            W.pb(cnt[i]);
    }
    sort(W.begin(),W.end(),greater<int>());
    int suma=0,wynik=n;
    for(int i=0;i<W.size();i++){
        suma+=W[i]+W[i]-1;
        if(suma>=n){
            wynik=i+1;
            break;
        }
    }
    cout<<wynik;

}
    
int32_t main(){
    speed
    int t = 1;
    //cin >> t;
    while(t--){
        solve();
    }
    return 0;
}