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#include <bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n, tmp, res{0};
    cin>>n;

    map<int, int> numbers; //nr, ilosc

    for(int i{0};i<n;i++)
    {
        cin>>tmp;
        numbers[tmp]++;
    }

    int j{0};
    vector<int>a(numbers.size());

    for(const auto x: numbers)  a[j++]=x.second;

    sort(a.rbegin(), a.rend());
    tmp = n;

    int i=0;
    while(tmp>0)
    {
        tmp-=2*a[i++]-1;
        res++;
    }
        
    cout<<res;
}