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#include <bits/stdc++.h>
using namespace std;
 
#ifdef DEBUG
auto &operator<<(auto &o, pair<auto, auto> p) {
    return o << "()" << p.first << ", " << p.second <<")";
}
auto operator<<(auto &o, auto x)-> decltype(x.end(), o) {
    o << "{";int i = 0;
    for(auto e : x) o << ", "+!i++<<e;
    return o <<"}";
}
#define debug(x...) cerr << "["#x"]: ",[](auto...$){((cerr<<$<<"; "),...)<<endl;}(x)
#else
#define debug(...) {}
#endif
 
#define int long long
#define all(x) x.begin(), x.end()
#define pb push_back
#define fi first
#define se second
typedef pair <int, int> pii;
 
void test() {
    int n; cin>>n;
    vector <int> cnt(n+1);
    for (int i=0; i<n; ++i) {
        int x; cin>>x;
        cnt[x]++;
    }
    sort(all(cnt));
    reverse(all(cnt));
    
    int dysp = 0;
    int wzi = 0;
    int res = 0;

    for (int i=0; i<n; ++i) {
        wzi += cnt[i];
        dysp += cnt[i] - 1;
        res++;
        if (wzi + dysp >= n) break;
    }
    cout<<res<<'\n';
}
 
signed main() {
  ios_base::sync_with_stdio(0); cin.tie(0);
  int t = 1; 
  while (t--) {
    test();
  }
}