mirror of
https://github.com/autistic-symposium/master-algorithms-py.git
synced 2025-10-31 14:18:54 -04:00
63 lines
1.2 KiB
Python
63 lines
1.2 KiB
Python
#!/usr/bin/env python3
|
|
# -*- coding: utf-8 -*-
|
|
# author: bt3gl
|
|
|
|
|
|
class Node:
|
|
def __init__(self, value, next=None):
|
|
|
|
self.value = value
|
|
self.next = next
|
|
|
|
|
|
class Queue:
|
|
|
|
def __init__(self, size):
|
|
|
|
self.size = size
|
|
self.count = 0
|
|
self.head = None
|
|
self.tail = None
|
|
|
|
def enqueue(self, value: int) -> bool:
|
|
|
|
if self.is_full():
|
|
return False
|
|
|
|
if self.is_empty():
|
|
self.head = self.tail = Node(value)
|
|
|
|
else:
|
|
self.tail.next = Node(value)
|
|
self.tail = self.tail.next
|
|
|
|
self.count += 1
|
|
|
|
return True
|
|
|
|
def dequeue(self) -> bool:
|
|
|
|
if self.is_empty():
|
|
return False
|
|
|
|
self.head = self.head.next
|
|
self.count -= 1
|
|
|
|
return True
|
|
|
|
def front(self) -> int:
|
|
if self.is_empty():
|
|
return False
|
|
return self.head.value
|
|
|
|
def rear(self) -> int:
|
|
if self.is_empty():
|
|
return False
|
|
return self.tail.value
|
|
|
|
def is_empty(self) -> bool:
|
|
return self.count == 0
|
|
|
|
def is_full(self) -> bool:
|
|
return self.count == self.size
|
|
|