set multiset

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define fastio ios_base::sync_with_stdio(0); cin.tie(0)

signed main()
{
    fastio;

    int x;
    multiset<int> ms;
    multiset<int>::iterator it;

    ms.size();
    ms.empty();
    ms.insert(x); // log n
    *ms.begin(); // min
    *ms.rbegin(); // max
    ms.count(x); // x-in sayi
    ms.erase(x); // butun x lari sil
    if(ms.find(x) != ms.end()) // eger varsa ms.count(x)
        ms.erase(ms.find(x)); // bir dene x sil

    ms.lower_bound(x); // x dan boyuk beraber ilk eded
    ms.upper_bound(x); // x dan boyuk ilk eded

    for(auto it = ms.begin(); it != ms.end(); it++){
        cout << *it << " ";
    }

    for(auto i : ms){
        cout << i << " ";
    }

    set<int> s;
    // her elementden 1 dene saxlayir
    // 7 4 5 5 6 2 2
    // 2 4 5 6 7
}