def __init__(self):
self.stack_one = Stack_Array()
self.stack_two = Stack_Array()
def __init__(self): self.stack_one = Stack_Array() self.stack_two = Stack_Array()
class Queue_Stack(object):
def __init__(self):
self.stack_one = Stack_Array()
self.stack_two = Stack_Array()
# if we want to push something and it is empty add to stack_one
# if we want to push and we have elements in stack_one but not stack_two just push
# If we want to push and we have no elements in stack_one
def enqueue(self, data):
if self.stack_two.is_empty() or self.is_empty():
self.stack_one.push(data)
elif self.stack_one.is_empty():
self.transfer()
self.stack_one.push(data)
def transfer(self):
if self.stack_one.is_empty() and self.stack_two.is_empty():
return
stack_to_empty = self.stack_two if self.stack_one.is_empty(
) else self.stack_one
stack_to_fill = self.stack_one if self.stack_one.is_empty(
) else self.stack_one
while not stack_to_empty.is_empty():
popped_item = stack_to_empty.pop()
stack_to_fill.push(popped_item)
def size(self):
return self.stack_one.__len__() + self.stack_two.__len__()
def __str__(self):
if self.stack_one.is_empty() and self.stack_two.is_empty():
return [].__str__()
if self.stack_two.is_empty():
print(self.stack_one)
if not self.stack_one.is_empty():
self.transfer()
return self.stack_one.__str__()
def is_empty(self):
return self.stack_one.is_empty() and self.stack_two.is_empty()
class Queue_Stack(object): def __init__(self): self.stack_one = Stack_Array() self.stack_two = Stack_Array() # if we want to push something and it is empty add to stack_one # if we want to push and we have elements in stack_one but not stack_two just push # If we want to push and we have no elements in stack_one def enqueue(self, data): if self.stack_two.is_empty() or self.is_empty(): self.stack_one.push(data) elif self.stack_one.is_empty(): self.transfer() self.stack_one.push(data) def transfer(self): if self.stack_one.is_empty() and self.stack_two.is_empty(): return stack_to_empty = self.stack_two if self.stack_one.is_empty() else self.stack_one stack_to_fill = self.stack_one if self.stack_one.is_empty() else self.stack_one while not stack_to_empty.is_empty(): popped_item = stack_to_empty.pop() stack_to_fill.push(popped_item) def size(self): return self.stack_one.__len__() + self.stack_two.__len__() def __str__(self): if self.stack_one.is_empty() and self.stack_two.is_empty(): return [].__str__() if self.stack_two.is_empty(): print(self.stack_one) if not self.stack_one.is_empty(): self.transfer() return self.stack_one.__str__() def is_empty(self): return self.stack_one.is_empty() and self.stack_two.is_empty()