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#include <bits/stdc++.h>
#pragma GCC optimize("O3", "unroll-loops")
#define pb emplace_back
#define ins insert
#define mp make_pair
#define ssize(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define pii pair <int, int>
#define pll pair <ll, ll>
#define pld pair <ld, ld>
#define st first
#define nd second

using namespace std;
using ll = int_fast64_t;
// using lll = __int128_t;
using ld = long double;
const int oo = 1e9 + 7;
const ll ool = 1e18;
const int mod = 1e9 + 7;

void solve(){
    int n; cin >> n;
    vector <int> tab(n);
    for(int i = 0; i < n; i ++){
        int x; cin >> x;
        -- x;
        ++ tab[x];
    }
    sort(rall(tab));
    vector <int> pref(n), suf(n);
    pref[0] = tab[0];
    for(int i = 1; i < n; i ++) pref[i] = pref[i - 1] + tab[i];
    suf[n - 1] = tab[n - 1];
    for(int i = n - 2; i >= 0; i --) suf[i] = suf[i + 1] + tab[i];
    for(int i = 0; i < n - 1; i ++){
        if(suf[i + 1] <= pref[i] - i - 1){
            cout << i + 1 << '\n';
            exit(0);
        }
    }
    cout << n << '\n';
}

signed main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    int t; t = 1;
    // cin >> t;
    while(t --) solve();
    return 0;
}