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Free memory after removing

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a node from a LinkedList or TreeNode.
This commit is contained in:
Yudong Jin
2023-01-02 19:53:55 +08:00
parent 6b02449f22
commit 410c5d6b62
20 changed files with 69 additions and 140 deletions
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7
codes/python/chapter_tree/binary_search_tree.py
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@ -117,7 +117,7 @@ class BinarySearchTree:
# 子结点数量 = 2
else:
# 获取中序遍历中 cur 的下一个结点
nex = self.min(cur.right)
nex = self.get_inorder_next(cur.right)
tmp = nex.val
# 递归删除结点 nex
self.remove(nex.val)
@ -125,11 +125,10 @@ class BinarySearchTree:
cur.val = tmp
return cur
""" 获取最小结点 """
def min(self, root: typing.Optional[TreeNode]) -> typing.Optional[TreeNode]:
""" 获取中序遍历中的下一个结点（仅适用于 root 有左子结点的情况） """
def get_inorder_next(self, root: typing.Optional[TreeNode]) -> typing.Optional[TreeNode]:
if root is None:
return root
# 循环访问左子结点，直到叶结点时为最小结点，跳出
while root.left is not None:
root = root.left