834. 树中距离之和
Hard | Dynamic Programming, Tree, Depth-First Search, Graph Theory
Tree
863. 二叉树中所有距离为 K 的结点
Medium | Hash Table, Tree, Depth-First Search, Breadth-First Search, Binary Tree
865. 包含所有最深节点的最小子树
Medium | Hash Table, Tree, Depth-First Search, Breadth-First Search, Binary Tree
872. 叶子相似的树
Easy | Tree, Depth-First Search, Binary Tree
889. 根据前序和后序遍历构造二叉树
Medium | Array, Hash Table, Divide and Conquer, Tree, Binary Tree
894. 所有可能的满二叉树
Medium | Dynamic Programming, Tree, Recursion, Memoization, Binary Tree
897. 递增顺序查找树
Easy | Stack, Tree, Depth-First Search, Binary Search Tree, Binary Tree
919. 完全二叉树插入器
Medium | Tree, Breadth-First Search, Design, Binary Tree
938. 二叉搜索树的范围和
Easy | Tree, Depth-First Search, Binary Search Tree, Binary Tree
951. 翻转等价二叉树
Medium | Tree, Depth-First Search, Binary Tree