This commit is contained in:
krahets
2023-04-09 05:12:22 +08:00
parent 01d05cc1f0
commit 37f11aff68
27 changed files with 265 additions and 248 deletions

View File

@@ -428,23 +428,24 @@ comments: true
```python title="linkedlist_queue.py"
class LinkedListQueue:
""" 基于链表实现的队列 """
"""基于链表实现的队列"""
def __init__(self):
""" 构造方法 """
"""构造方法"""
self.__front: ListNode | None = None # 头节点 front
self.__rear: ListNode | None = None # 尾节点 rear
self.__rear: ListNode | None = None # 尾节点 rear
self.__size: int = 0
def size(self) -> int:
""" 获取队列的长度 """
"""获取队列的长度"""
return self.__size
def is_empty(self) -> bool:
""" 判断队列是否为空 """
"""判断队列是否为空"""
return not self.__front
def push(self, num: int) -> None:
""" 入队 """
"""入队"""
# 尾节点后添加 num
node = ListNode(num)
# 如果队列为空,则令头、尾节点都指向该节点
@@ -458,7 +459,7 @@ comments: true
self.__size += 1
def pop(self) -> int:
""" 出队 """
"""出队"""
num = self.peek()
# 删除头节点
self.__front = self.__front.next
@@ -466,14 +467,14 @@ comments: true
return num
def peek(self) -> int:
""" 访问队首元素 """
"""访问队首元素"""
if self.size() == 0:
print("队列为空")
return False
return self.__front.val
def to_list(self) -> list[int]:
""" 转化为列表用于打印 """
"""转化为列表用于打印"""
queue = []
temp = self.__front
while temp:
@@ -1103,27 +1104,28 @@ comments: true
```python title="array_queue.py"
class ArrayQueue:
""" 基于环形数组实现的队列 """
"""基于环形数组实现的队列"""
def __init__(self, size: int) -> None:
""" 构造方法 """
"""构造方法"""
self.__nums: list[int] = [0] * size # 用于存储队列元素的数组
self.__front: int = 0 # 队首指针,指向队首元素
self.__size: int = 0 # 队列长度
self.__front: int = 0 # 队首指针,指向队首元素
self.__size: int = 0 # 队列长度
def capacity(self) -> int:
""" 获取队列的容量 """
"""获取队列的容量"""
return len(self.__nums)
def size(self) -> int:
""" 获取队列的长度 """
"""获取队列的长度"""
return self.__size
def is_empty(self) -> bool:
""" 判断队列是否为空 """
"""判断队列是否为空"""
return self.__size == 0
def push(self, num: int) -> None:
""" 入队 """
"""入队"""
assert self.__size < self.capacity(), "队列已满"
# 计算尾指针,指向队尾索引 + 1
# 通过取余操作,实现 rear 越过数组尾部后回到头部
@@ -1133,7 +1135,7 @@ comments: true
self.__size += 1
def pop(self) -> int:
""" 出队 """
"""出队"""
num: int = self.peek()
# 队首指针向后移动一位,若越过尾部则返回到数组头部
self.__front = (self.__front + 1) % self.capacity()
@@ -1141,12 +1143,12 @@ comments: true
return num
def peek(self) -> int:
""" 访问队首元素 """
"""访问队首元素"""
assert not self.is_empty(), "队列为空"
return self.__nums[self.__front]
def to_list(self) -> list[int]:
""" 返回列表用于打印 """
"""返回列表用于打印"""
res: list[int] = [0] * self.size()
j: int = self.__front
for i in range(self.size()):