摘要：
Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia: “The lowes
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posted @ 2025-03-27 19:46
ZhangZhihuiAAA
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A path in a binary tree is a sequence of nodes where each pair of adjacent nodes in the sequence has an edge connecting them. A node can only appear i
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posted @ 2025-03-27 16:58
ZhangZhihuiAAA
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You are given the root of a binary tree containing digits from 0 to 9 only. Each root-to-leaf path in the tree represents a number. For example, the r
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posted @ 2025-03-26 22:17
ZhangZhihuiAAA
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Given the root of a binary tree and an integer targetSum, return true if the tree has a root-to-leaf path such that adding up all the values along the
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posted @ 2025-03-26 17:48
ZhangZhihuiAAA
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Given the root of a binary tree, flatten the tree into a "linked list": The "linked list" should use the same TreeNode class where the right child poi
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posted @ 2025-03-26 12:12
ZhangZhihuiAAA
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摘要：
Given a binary tree struct Node { int val; Node *left; Node *right; Node *next; } Populate each next pointer to point to its next right node. If there
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posted @ 2025-03-26 11:34
ZhangZhihuiAAA
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Given two integer arrays inorder and postorder where inorder is the inorder traversal of a binary tree and postorder is the postorder traversal of the
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posted @ 2025-03-26 09:09
ZhangZhihuiAAA
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摘要：
Given two integer arrays preorder and inorder where preorder is the preorder traversal of a binary tree and inorder is the inorder traversal of the sa
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posted @ 2025-03-24 22:26
ZhangZhihuiAAA
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Given the root of a binary tree, check whether it is a mirror of itself (i.e., symmetric around its center). Example 1: Input: root = [1,2,2,3,4,4,3]
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posted @ 2025-03-24 09:22
ZhangZhihuiAAA
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Design a data structure that follows the constraints of a Least Recently Used (LRU) cache. Implement the LRUCache class: LRUCache(int capacity) Initia
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posted @ 2025-03-23 17:42
ZhangZhihuiAAA
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