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#include <bits/stdc++.h>

using namespace std;



unordered_map<int,int> counts;
vector<int> sorted_counts;

int main(int argc, char const *argv[])
{
    ios_base::sync_with_stdio(0);

    int n;
    int k;
    cin>>n;

    for (size_t i = 0; i < n; i++)
    {
        cin>>k;
        auto it = counts.find(k);
        if( it ==  counts.end())
            counts[k] = 1;
        else
            counts[k]++;
    }
    for (auto& item : counts){
        sorted_counts.push_back(item.second);
    }
    
    sort(sorted_counts.begin(),sorted_counts.end(), std::greater<>());
    
    int result = 0;
    int elements_taken = 0;
    for(auto count: sorted_counts){
        result++;
        elements_taken += count*2 - 1;

        
        //cout<<result<<" "<<elements_taken<<endl;

        if (elements_taken >= n)
            break;

    }

    cout<<result<<endl;

    return 0;
}