449. Serialize and Deserialize BST
449. Serialize and Deserialize BST
參考 297. Serialize and Deserialize
Design
380. Insert Delete GetRandom O\(1\)
380. Insert Delete GetRandom O(1)
class RandomizedSet:
def __init_
271. Encode and Decode Strings
271. Encode and Decode Strings
class Codec:
def __init__(self,