public int LeftShift(int index, bool removeTop)
{
MyStack stack = stacks[index];
int removed_item;
removed_item = (removeTop) ? stack.Pop() : stack.RemoveBottom();
if (stack.IsEmpty())
{
stacks.Remove(stacks[index]);
}
else if (stacks.Count > index + 1)
{
int item = LeftShift(index + 1, false);
stack.Push(item);
}
return(removed_item);
}
public bool IsEmpty()
{
MyStack last = GetLastStack();
return(last == null || last.IsEmpty());
}