leetcode 111. Minimum Depth of Binary Tree(二叉树最小深度) Given a binary tree, find its minimum depth. The minimu…
leetcode Convert Sorted Array to Binary Search Tree(有序列表转化为BST) Given an array where elements are sorted in ascending o…
leetcode 107. Binary Tree Level Order Traversal II(二叉树分层排序) Given a binary tree, return the bottom-up level order t…
leetcode 104. Maximum Depth of Binary Tree(二叉树深度-DFS方法) Given a binary tree, find its maximum depth. The maximu…