摘要：
You are given an array of k linked-lists lists, each linked-list is sorted in ascending order. Merge all the linked-lists into one sorted linked-list
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posted @ 2025-04-02 12:38
ZhangZhihuiAAA
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Given an m x n grid of characters board and a string word, return true if word exists in the grid. The word can be constructed from letters of sequent
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posted @ 2025-04-01 22:00
ZhangZhihuiAAA
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Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. Example 1: Input: n = 3 Output: ["((()))","(()
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posted @ 2025-04-01 21:20
ZhangZhihuiAAA
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The n-queens puzzle is the problem of placing n queens on an n x n chessboard such that no two queens attack each other. Given an integer n, return th
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posted @ 2025-04-01 20:40
ZhangZhihuiAAA
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Given an array of distinct integers candidates and a target integer target, return a list of all unique combinations of candidates where the chosen nu
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posted @ 2025-04-01 20:12
ZhangZhihuiAAA
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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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摘要：
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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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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