📅  最后修改于: 2023-12-03 15:32:46.451000             🧑  作者: Mango
m-Way搜索树是一种多叉树结构,与二叉搜索树不同,每个非叶子节点可以拥有超过两个的子节点。m-Way搜索树的套装2包含了插入和删除两种操作。
插入操作将新的节点添加到树中。在m-Way搜索树中,插入新节点的过程涉及到节点的比较和移动。下面是一个简化版的插入算法:
具体实现可以参考下面的代码片段:
class MWayTreeNode:
def __init__(self, value, children=[]):
self.value = value
self.children = children
class MWayTree:
def __init__(self, order):
self.order = order
self.root = None
def insert(self, value):
if not self.root:
self.root = MWayTreeNode(value)
return True
node = self.root
while True:
i = self.find_index(value, node)
if i < len(node.children) and node.children[i].value == value:
return False
if len(node.children[i].children) < self.order-1:
node.children[i].children.append(MWayTreeNode(value))
return True
else:
node = node.children[i]
def find_index(self, value, node):
if len(node.children) == 0:
return 0
for i in range(len(node.children)):
if node.children[i].value > value:
return i
return len(node.children)
删除操作从树中移除节点。在m-Way搜索树中,删除节点的过程可能会改变树的结构。下面是一个简化版的删除算法:
具体实现可以参考下面的代码片段:
class MWayTree:
# 初始化代码省略
def delete(self, value):
def _delete(node, value):
if not node:
return None
for i in range(len(node.children)):
if node.children[i].value == value:
child = node.children[i]
if not child.children:
del node.children[i]
elif len(child.children) == 1:
node.children[i] = child.children[0]
else:
successor = child.children[0]
while successor.children:
successor = successor.children[-1]
child.value = successor.value
_delete(child.children[0], successor.value)
return True
elif node.children[i].value > value:
break
if len(node.children[i].children) == 0:
del node.children[i]
return True
else:
return _delete(node.children[i], value)
if not self.root:
return False
if self.root.value == value and not self.root.children:
self.root = None
return True
return _delete(self.root, value)
以上就是m-Way搜索树套装2的插入和删除操作。通过这两种操作,我们可以高效地维护m-Way搜索树的结构。