摘要：
Given an array nums of distinct integers, return all the possible permutations. You can return the answer in any order. Example 1: Input: nums = [1,2,
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posted @ 2025-04-01 19:32
ZhangZhihuiAAA
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摘要：
Given two integers n and k, return all possible combinations of k numbers chosen from the range [1, n]. You may return the answer in any order. Exampl
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posted @ 2025-04-01 12:09
ZhangZhihuiAAA
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Given an m x n board of characters and a list of strings words, return all words on the board. Each word must be constructed from letters of sequentia
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posted @ 2025-03-31 22:32
ZhangZhihuiAAA
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A trie (pronounced as "try") or prefix tree is a tree data structure used to efficiently store and retrieve keys in a dataset of strings. There are va
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posted @ 2025-03-31 21:36
ZhangZhihuiAAA
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摘要：
Design a data structure that supports adding new words and finding if a string matches any previously added string. Implement the WordDictionary class
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posted @ 2025-03-31 19:29
ZhangZhihuiAAA
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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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摘要：
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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摘要：
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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