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
47
48
49
50
51
52
53
54
55
56
// clang-format off
#include <bits/stdc++.h>

using namespace std;

#define ALL(x) (x).begin(), (x).end()

template<class C> void mini(C &a5, C b5) { a5 = min(a5, b5); }
template<class C> void maxi(C &a5, C b5) { a5 = max(a5, b5); }

#ifdef LOCAL
const bool debug = true;
#else
const bool debug = false;
#define cerr if (true) {} else cout
#endif
// clang-format on

#define int long long
#define double long double

const int INF = 1e18;
const int mod = 1e9 + 7;

const int nax = 1e6 + 5;
int counter[nax];

int32_t main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    int n;
    cin >> n;

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

    sort(counter, counter + n + 1);
    reverse(counter, counter + n + 1);
    
    int ans = 0;
    int i = 0;
    while (n > 0) {
        n -= 2 * counter[i] - 1;
        ans++;
        i++;
    }
    cout << ans << "\n";
    
    return 0;
}/*

*/