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#include <bits/stdc++.h>

using llu = unsigned long long;
using ll = long long;

#define int ll
using namespace std;

int32_t main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    int n;
    cin >> n;
    map<int, int> cnt;
    for (int i = 0; i < n; i++) {
        int x;
        cin >> x;
        cnt[x]++;
    }
    vector<int> a;
    for (auto [x, c] : cnt) {
        a.push_back(c);
    }
    sort(a.rbegin(), a.rend());
    int cur = 0;
    int ans = 0;
    for (auto i : a) {
        cur += i + i - 1;
        ans++;
        if (cur >= n) break;
    }
    cout << ans << '\n';

    return 0;
}