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#include <bits/stdc++.h>
 
using namespace std;
 
#define endl '\n'
#define L long long
#define MP make_pair
#define REP(i, n) for(int i = 0; i < n; ++i)
#define REPR(i, n) for(int i = n - 1; i >= 0; --i)
#define FOR(i, a, b) for(int i = a; i < b; ++i)
#define FORR(i, a, b) for(int i = b - 1; i >= a; --i)
#define EB emplace_back
#define ST first
#define ND second
#define S size
#define RS resize
 
template<class T> using P = pair<T, T>;
template<class T> using V = vector<T>;
 
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
 
    int n;
    cin >> n;

    V<int> w(n);
    REP(i, n) {
        int a;
        cin >> a;
        w[a - 1]++;
    }

    V<int> v(n + 1);
    for (int c : w) {
        if (c > 0) {
            v[c]++;
        }
    }

    int r = 0, s = 0, i = n;
    while (n - s > s - r) {
        if (v[i] == 0) {
            i--;
            continue;
        }
        s += i;
        r++;
        v[i]--;
    }

    cout << r << '\n';
}