摘要：
A transformation sequence from word beginWord to word endWord using a dictionary wordList is a sequence of words beginWord -> s1 -> s2 -> ... -> sk su
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posted @ 2025-03-31 16:33
ZhangZhihuiAAA
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A gene string can be represented by an 8-character long string, with choices from 'A', 'C', 'G', and 'T'. Suppose we need to investigate a mutation fr
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posted @ 2025-03-31 11:39
ZhangZhihuiAAA
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You are given an n x n integer matrix board where the cells are labeled from 1 to n2 in a Boustrophedon style starting from the bottom left of the boa
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posted @ 2025-03-30 22:32
ZhangZhihuiAAA
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There are a total of numCourses courses you have to take, labeled from 0 to numCourses - 1. You are given an array prerequisites where prerequisites[i
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posted @ 2025-03-30 14:12
ZhangZhihuiAAA
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You are given an array of variable pairs equations and an array of real numbers values, where equations[i] = [Ai, Bi] and values[i] represent the equa
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posted @ 2025-03-30 10:12
ZhangZhihuiAAA
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Given a reference of a node in a connected undirected graph. Return a deep copy (clone) of the graph. Each node in the graph contains a value (int) an
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posted @ 2025-03-28 22:04
ZhangZhihuiAAA
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You are given an m x n matrix board containing letters 'X' and 'O', capture regions that are surrounded: Connect: A cell is connected to adjacent cell
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posted @ 2025-03-28 12:06
ZhangZhihuiAAA
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Given an m x n 2D binary grid grid which represents a map of '1's (land) and '0's (water), return the number of islands. An island is surrounded by wa
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posted @ 2025-03-28 08:52
ZhangZhihuiAAA
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Given the root of a binary tree, determine if it is a valid binary search tree (BST). A valid BST is defined as follows: The left subtree of a node co
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posted @ 2025-03-27 23:17
ZhangZhihuiAAA
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摘要：
Given the root of a binary tree, return the level order traversal of its nodes' values. (i.e., from left to right, level by level). Example 1: Input:
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posted @ 2025-03-27 21:03
ZhangZhihuiAAA
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