static void Main(string[] args)
{
CustomStack <string> myStack = new CustomStack <string>();
string[] input = Console.ReadLine().Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
while (input[0] != "END")
{
string cmd = input[0];
switch (cmd)
{
case "Push":
for (int i = 1; i < input.Length; i++)
{
string currElement = input[i];
myStack.Push(currElement);
}
;
break;
case "Pop":
myStack.Pop();
break;
default:
break;
}
input = Console.ReadLine().Split(new char[] { ',', ' ' }, StringSplitOptions.RemoveEmptyEntries);
}
foreach (var item in myStack)
{
Console.WriteLine(item);
}
foreach (var item in myStack)
{
Console.WriteLine(item);
}
}