#include <iostream>
#include <set>
using namespace std;

int main()
{
    multiset<int> ms = {5, 3, 3, 1};

    //multiset<int>::iterator it = ms.find(3);
    auto it = ms.find(0);

    if (it != ms.end())
        cout << *it;
    else
        cout << "Not Found!";

    return 0;
}