static void Main()
{
string commandLine = String.Empty;
CustomStack <string> customStack = new CustomStack <string>();
while ((commandLine = Console.ReadLine()) != "END")
{
string[] commands = commandLine
.Split(new char[] { ' ', ',' }, StringSplitOptions.RemoveEmptyEntries);
if (commands[0] == "Push")
{
string[] elements = commands
.Skip(1)
.ToArray();
for (int i = 0; i < elements.Length; i++)
{
customStack.Push(elements[i]);
}
}
else if (commands[0] == "Pop")
{
if (customStack.Count() == 0)
{
Console.WriteLine("No elements");
}
else
{
customStack.Pop();
}
}
}
foreach (var item in customStack)
{
Console.WriteLine(item);
}
foreach (var item in customStack)
{
Console.WriteLine(item);
}
}