#include<iostream>

#include<vector>

#include<algorithm>

#include<set>

using namespace std;

int main()

{

    /*初始化方式*/

    vector<int>vec = { , , , ,  };

    set<int>iset(vec.begin(), vec.end());

    //int a[5] = { 1, 2, 3, 4, 5 };

    //set<int > setc(a, a + 5); //数组a初始化一个set；

    cout << iset.count() << endl;

    auto it = iset.begin();

    while (it!=iset.end())

    {

        cout << *it << endl;

        it++;

    }

    system("pause");

    return ;

}