#include<bits/stdc++.h>
using namespace std;
int main() {
	int a[] = {1,2,3};
	set<int> s;
	set<int>::iterator iter;
	s.insert(a,a+3);
	for(iter = s.begin() ; iter != s.end() ; ++iter) {
		cout<<*iter<<" ";
	}
	cout<<endl;
	pair<set<int>::iterator,bool> pr;
	pr = s.insert(5);
	if(pr.second) {
		cout<<*pr.first<<endl;
	}
	return 0;
}