static void Main(string[] args)
{
Stack1 objstack1 = new Stack1();
Stack2 objstack2 = new Stack2();
int input = int.Parse(Console.ReadLine());
for (int i = 0; i < input; i++)
{
string val = Console.ReadLine();
string[] values = val.Split(' ');
if (values[0] == "1")
{
objstack1.push(int.Parse(values[1]));
}
else if (values[0] == "2")
{
int chk;
if (objstack2.empty())
{
while ((chk = objstack1.pop()) != 0)
{
objstack2.push(chk);
}
}
objstack2.pop();
//int chk2;
//while ((chk2= objstack2.pop()) != 0)
//{
// objstack1.push(chk2);
//}
}
else
{
int chk3;
if (objstack2.empty())
{
while ((chk3 = objstack1.pop()) != 0)
{
objstack2.push(chk3);
}
}
Console.WriteLine(objstack2.print());
//int chk4;
//while ((chk4=objstack2.pop() )!= 0)
//{
// objstack1.push(chk4);
//}
}
}
Console.ReadKey();
}