def push(self, item):
## Regular stack
n1 = Node(item)
n1.next = self.top
self.top = n1
##stack maintaing minimum
if self.topMinimum == []:
self.topMinimum.append(item)
else:
if item < self.topMinimum[len(self.topMinimum) - 1]:
self.topMinimum.append(item)
else:
self.topMinimum.append(self.topMinimum[len(self.topMinimum) - 1])
def push(self,item):
self.size=self.size+1
n1=Node(item)
n1.next=self.top
self.top=n1