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// clang-format off
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ssize(x) int(x.size())
template<class A,class B>auto&operator<<(ostream&o,pair<A,B>p){return o<<'('<<p.first<<", "<<p.second<<')';}
template<typename T,typename = typename enable_if<!is_same<T,string>::value>::type>
auto operator<<(ostream&o,T x)->decltype(x.end(),o){o<<'{';int i=0;for(auto e:x)o<<(", ")+2*!i++<<e;return o<<'}';}
#ifdef DEBUG
#define debug(x...) cerr<<"["#x"]: ",[](auto...$){((cerr<<$<<"; "),...);}(x),cerr<<'\n'
#else
#define debug(...) {}
#endif
// clang-format on

int cnt[500007];

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

    int n, a, s = 0;
    cin >> n;
    for (int i = 0; i < n; i++)
    {
        cin >> a;
        cnt[a - 1]++;
    }

    sort(cnt, cnt + n);
    for (int i = n - 1; i >= 0; i--)
    {
        s += cnt[i] * 2 - 1;
        if (s >= n)
        {
            cout << n - i << '\n';
            return 0;
        }
    }

    return 0;
}