019f8fd211
git-subtree-dir: users/wpcarro git-subtree-mainline:464bbcb15cgit-subtree-split:24f5a642afChange-Id: I6105b3762b79126b3488359c95978cadb3efa789
20 lines
434 B
Python
20 lines
434 B
Python
from stack import Stack
|
|
|
|
class Queue(object):
|
|
def __init__(self):
|
|
self.lhs = Stack()
|
|
self.rhs = Stack()
|
|
|
|
def enqueue(self, x):
|
|
self.rhs.push(x)
|
|
|
|
def dequeue(self, x):
|
|
y = self.rhs.pop()
|
|
while y:
|
|
self.lhs.push(y)
|
|
y = self.rhs.pop()
|
|
result = self.lhs.pop()
|
|
y = self.lhs.pop()
|
|
while y:
|
|
self.rhs.push(y)
|
|
return result
|