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#include <iostream>
#include <string>
#include <algorithm>
#include <vector>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;

    vector<int> cnt(n + 1);
    int x;

    for (int i = 0; i < n; ++i)
    {
        cin >> x;
        ++cnt[x];
    }

    sort(cnt.begin(), cnt.end(), greater<>());
    int s = 0;

    int k = 0;
    for (; s < n; ++k)
    {
        s += cnt[k] - 1;
        n -= cnt[k];
    }

    cout << k;
}