int main()
{
	Set set;
	char ch='y';
	int opt,key;
	while(ch!='n')
	{
		cout<<"1. Insert 2.List 3.Size 4.Delete 5.Lookup\n";
		cin>>opt;
		switch (opt)
		{
			case 1:cout<<"Enter key \n";
			       cin>>key;
			       set.insert(key);
			       break;
			case 2:set.list();
			       break;
			case 3:cout<<"Size of set is "<<set.size()<<"\n";
			       break;
			case 4:cout<<"Enter the key that you want to delete \n";
			       cin>>key;
			       set.deletekey(key);
			       break;
			case 5:cout<<"Enter the key that you want to lookup \n";
			       cin>>key;
			       set.lookup(key);
			       break;
			default:break;
			
		}
		cout<<"Want to continue ? \n";
		cin>>ch;
	}
	

}