static void Main(string[] args)
{
StackWithMax stack = new StackWithMax();
int n = int.Parse(Console.ReadLine());
for (int i = 0; i < n; ++i)
{
string[] buf = Console.ReadLine().Split(new char[] { ' ' },
StringSplitOptions.RemoveEmptyEntries);
if (buf[0] == "push")
{
stack.Push(int.Parse(buf[1]));
}
if (buf[0] == "pop")
{
stack.Pop();
}
if (buf[0] == "max")
{
Console.WriteLine(stack.Max());
}
}
Console.ReadKey();
}
public QueueWithMax()
{
this.LStack = new StackWithMax();
this.RStack = new StackWithMax();
}
