#include <iostream>
#include <memory>
 
class User{
public:
	int URI = 0;
	User(int a){
		URI = a;
	}
}
 
class Group {
public:
	std::shared_ptr <std::vector<User>> members = std::make_shared<std::vector<User>>();
	void Group::remove(User a) {
		for (auto i = 0; i < members->size(); i++){
	    	if (a.URI == (*(members->begin()+i)).URI) members->erase(*(members->begin() + i));
	    }
	Group(User a, User b, User c){
		members -> push_back(a); 
		members -> push_back(b);
		members -> push_back(c);
	}
}
 
int main() {
	User a(1), b(2), c(3);
	Group obj(a, b, c);
 
	obj.remove(a);
 
	return 0;
}