#include <iostream>
#include<vector>
#include<memory>
using namespace std;
class A
{
	int id_;
	public:
	void setID(int id){id_ = id;}
	int getID(){return id_;}
};
class B
{
	vector<unique_ptr<A>> vec;
	public:
	void fill(int id)
	{
		std::unique_ptr<A> a(new A());
		a->setID(id);
		vec.push_back(std::move(a));
	}
	void test()
	{
		for(const auto& n : vec)
		{
			cout<<n->getID()<<" ";
			//do other thing as u want .. like inserting elements
		}
	}
 
};
 
int main() {
	B b;
	b.fill(23);
	b.fill(1);
	b.fill(32);
	b.fill(123);
	b.test();
 
	return 0;
}

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