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#include<bits/stdc++.h>
#define vi vector<int>
#define ALL(x) begin(x), end(x)
using namespace std;

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

    int n;
    cin >> n;
    vi v(n + 5, 0);

    for (int i = 0; i < n; i++) {
        int a;
        cin >> a;
        v[a]++;
    }

    sort(ALL(v));
    reverse(ALL(v));

    int prefsum = 0;
    int allowed = 0;
    for (int i = 0; i < n; i++) {
        prefsum += v[i];
        allowed += v[i] -  1;

        if (allowed >= (n - prefsum)) {
            cout << (i + 1) << "\n";
            return 0;
        }
    }
    
    return 0;
}