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