Serialize and Deserialize Binary Tree
Design an algorithm to serialize and deserialize a binary tree. There is no restriction on how your serialization/deserialization algorithm should work. You just need to ensure that a binary tree can be serialized to a string and this string can be deserialized to the original tree structure. Tags: Tree
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# Definition for a binary tree node.
# class TreeNode(object):
# def __init__(self, x):
# self.val = x
# self.left = None
# self.right = None
class Codec:
def serialize(self, root):
"""Encodes a tree to a single string.
:type root: TreeNode
:rtype: str
"""
if not root:
return 'n'
val = str(root.val)
left = self.serialize(root.left)
right = self.serialize(root.right)
return val + ',' + left + ',' + right
def deserialize(self, data):
"""Decodes your encoded data to tree.
:type data: str
:rtype: TreeNode
"""
self.data = data
if self.data[0] == 'n':
return None
first_break = self.data.find(',')
node = TreeNode(int(self.data[:first_break]))
node.left = self.deserialize(self.data[first_break + 1:])
second_break = self.data.find(',')
node.right = self.deserialize(self.data[second_break + 1:])
return node
# Your Codec object will be instantiated and called as such:
# ser = Codec()
# deser = Codec()
# ans = deser.deserialize(ser.serialize(root))