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#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <unordered_map>
#include <assert.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/trie_policy.hpp>
//using namespace __gnu_pbds

using namespace std;

template<class A, class B>
ostream& operator<<(ostream& o, const pair<A, B>& p) {
    return o << '(' << p.first << ", " << p.second << ')';
}
template<class A, class B, class C>
ostream& operator<<(ostream& o, const tuple<A, B, C>& t) {
    return o << '(' << get<0>(t) << ", " << get<1>(t) << ", " << get<2>(t) << ')';
}
template<class T>
auto operator<<(ostream& o, const T& x) -> decltype(x.end(), o) {
    o << '{';
    int i = 0;
    for (const auto& e : x) {
        o << (", ") + 2 * !i++ << e;
    }
    return o << '}';
}
auto operator<<(ostream& o, const string& s) -> decltype(o) {
    for (const auto& e : s) {
        o << e;
    }
    return o;
}
//#define DEBUG
#ifdef DEBUG
#define fastio()
#define debug(x...) cerr << "[" #x "]: ", [](auto... $) {((cerr << $ << "; "), ...); }(x), cerr << '\n'
#define asrt(x) if (!(x)) { cerr << "Assertion failed: " << #x << " in line " << __LINE__ << endl; exit(1); }
#else
#define fastio() ios_base::sync_with_stdio(0); cin.tie(0);
#define debug(...)
#define asrt(x)
#endif
#define pii pair<int,int>
#define inf 2'000'000'000
#define llinf 8'000'000'000'000'000'000
#define mod 998'244'353
#define mod7 1'000'000'007
#define mod9 1'000'000'009
#define eps 0.00000000001
#define all(x) x.begin(),x.end()
#define rev(x) x.rbegin(),x.rend()
#define decrease(x) x,vector<x>,greater<x>
#define maxn 500'000
typedef long long ll;
typedef long double ld;

vector <int> v;
int bsort[maxn + 5];

void solve() {
    int n;
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) {
        int x;
        cin >> x;
        bsort[x]++;
    }
    for (int i = 1; i <= n; i++)
     if (bsort[i] > 0)
     v.push_back(bsort[i]);
    sort(all(v), greater<int>());
    debug(v);
    for (int i = 0; i < v.size(); i++) {
        n -= 2 * v[i] - 1;
        if (n <= 0) {
            printf("%d\n", i + 1);
            exit(0);
        }
    }
}

signed main() {
    if (maxn + 0 == 0) cerr << "WARNING - maxn is undefined\n";
    if (maxn + 0 <= 100) cerr << "warning - maxn might be too low\n";
    int t = 1;
    //cin >> t;
    while (t--) solve();
}