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摘要： Shortest PalindromeGiven a string S, you are allowed to convert it to a palindrome by adding characters in front of it. Find and return the shortest p... 阅读全文

摘要： Kth Largest Element in an ArrayFind thekth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the ... 阅读全文

摘要： Word LadderGiven two words (beginWordandendWord), and a dictionary, find the length of shortest transformation sequence frombeginWordtoendWord, such t... 阅读全文

摘要： Second Highest SalaryWrite a SQL query to get the second highest salary from theEmployeetable.+----+--------+| Id | Salary |+----+--------+| 1 | 100 ... 阅读全文

摘要： Clone GraphClone an undirected graph. Each node in the graph contains alabeland a list of itsneighbors.OJ's undirected graph serialization:Nodes are l... 阅读全文

摘要： Merge k Sorted ListsMergeksorted linked lists and return it as one sorted list. Analyze and describe its complexity.https://leetcode.com/submissions/d... 阅读全文

摘要： Merge Two Sorted ListsMerge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the fir... 阅读全文

摘要： Valid SudokuDetermine if a Sudoku is valid, according to:Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are ... 阅读全文

摘要： Valid Palindrome Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example,"A man, a p 阅读全文

摘要： Add Binary Given two binary strings, return their sum (also a binary string). For example,a = "11"b = "1"Return "100". https://leetcode.com/problems/a 阅读全文