leetcode1261

 1 class FindElements:
 2 
 3     def __init__(self, root: TreeNode):
 4         self.ary = []
 5         if root != None:
 6             self.recoverTree(root,0)
 7         
 8         
 9     def recoverTree(self,root,v):
10         root.val = v
11         self.ary.append(v)
12         if root.left != None:
13             self.recoverTree(root.left,v * 2 + 1)
14         if root.right != None:
15             self.recoverTree(root.right,v * 2 + 2)
16     
17         
18 
19     def find(self, target: int) -> bool:
20         return target in self.ary