佛系转码每日随便几题打卡

1/22/21
106.Construct Binary Tree from Inorder and Postorder Traversal

1/24/21
105        Construct Binary Tree from Preorder and Inorder Traversal        Medium

1/25/21
116        Populating Next Right Pointers in Each Node        Medium

1/26/21
117        Populating Next Right Pointers in Each Node II        Medium

1/30/21
236        Lowest Common Ancestor of a Binary Tree        Medium

一天一题都没做到，这该死的全职。。。

好久没来打卡，断断续续做了一些题，tree专题复习完了，接下来打算做一下array and string专题
297        Serialize and Deserialize Binary Tree
124        Binary Tree Maximum Path Sum
98        Validate Binary Search Tree
863        All Nodes Distance K in Binary Tree
103        Binary Tree Zigzag Level Order Traversal
543        Diameter of Binary Tree
545        Boundary of Binary Tree
173        Binary Search Tree Iterator
226        Invert Binary Tree
572        Subtree of Another Tree
426        Convert Binary Search Tree to Sorted Doubly Linked List
724        Find a pivot index
747        Largest Number At Least Twice of Others
66        Plus One