class Stack:
def __init__(self):
self.size = 0
self.storage = LinkedList()
def __len__(self):
return self.size
pass
def push(self, value):
self.storage.addToTail(value)
self.size += 1
def pop(self):
if self.size >= 1:
self.size -= 1
return self.storage.removeTail()
else:
return
