// Nie opuszczaj siê!
#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;
    int niunia, mio[n+1], risa = 0, odp = 0;
    fill(mio,mio+n+1,0);
    for (int i = 0; i < n; i++)
        cin >> niunia, mio[niunia]++;
    sort(mio,mio+n+1), niunia = n;
    while (risa < n)
        odp++, risa += 2*mio[niunia--]-1;
    cout << odp << endl;
    return 0;
}