1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
#if defined(EMBE_DEBUG) && !defined(NDEBUG)
#include "embe-debug.hpp"
#else
#define LOG_INDENT(...) do {} while (false)
#define LOG(...) do {} while (false)
#define DUMP(...) do {} while (false)
#endif

#include <iostream>
#include <vector>
#include <algorithm>
#include <ranges>
using namespace std;

int main()
{
  iostream::sync_with_stdio(false);
  cin.tie(nullptr);

  int n;
  cin >> n;
  vector<int> counts(n + 1);

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

  ranges::sort(counts);

  int res = 0;
  int covered = 0;

  for (int c: counts | views::reverse) {
    if (covered >= n) break;
    if (c > 0) {
      covered += 2 * c - 1;
      ++res;
    }
  }

  cout << res << endl;

  return 0;
}