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#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
using namespace __gnu_pbds;
using namespace std;
#define pb push_back
#define st first
#define nd second
typedef long long ll;
typedef long double ld;
const ll I = 1000LL * 1000LL * 1000LL * 1000LL * 1000LL * 1000LL;
const ll M = 1000LL * 1000LL * 1000LL + 7LL;
const int N = 1000 * 1000 + 7;
int tab[N];

void Solve()
{
    int n, x, s = 0;
    cin >> n;
    for(int i = 1; i <= n; ++i)
    {
        cin >> x;
        ++tab[x];
    }
    sort(tab + 1, tab + 1 + n);
    for(int i = n; i >= 1; --i)
    {
        s += tab[i];
        if(2 * s - (n - i + 1) >= n)
        {
            cout << n - i + 1 << "\n";
            return;
        }
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    //int t; cin >> t;
    //while(t--)
        Solve();

    return 0;
}