把二叉搜尋樹轉化成更大的樹

"""

definition of treenode:
class treenode:
def __init__(self, val):
self.val = val
self.left, self.right = none, none
"""class solution:
"""@param root: the root of binary tree
@return: the new root
"""def __init__(self):
self.lsum = 0
def convertbst(self, root):
# write your code here
if root is none:
return none
self.convertbst(root.right)# 初始化 lsum為右節點
self.lsum += root.val # 右節點加根節點值
root.val = self.lsum # 把值賦給根節點
self.convertbst(root.left) #遞迴左潔典
return root

given a binary search tree `｀:

5

/ \
2 13

18

/ \
20 13

把二叉搜尋樹轉化成更大的樹

definition of treenode class treenode def init self,val self.val val self.left,self.right none,none class solution param root the root of binary tree ...

BST 把搜尋二叉樹轉化成雙鏈表

題目 epi 雙鏈表的節點和二叉樹節點類似，left當做前繼節點prev，right當做後繼節點next typedef shared ptrpnode 返回值是pair型別，first是雙鏈表第乙個節點，second是雙鏈表最後乙個節點 paircovert bst to doublelist c...

BST 把搜尋二叉樹轉化成雙鏈表

題目 epi 雙鏈表的節點和二叉樹節點類似，left當做前繼節點prev，right當做後繼節點next typedef shared ptr pnode 返回值是pair型別，first是雙鏈表第乙個節點，second是雙鏈表最後乙個節點 paircovert bst to doublelist ...