Lazyafei's Blog

Palindrome: palin-,重，再，-drome,跑，词源同dromedary,hippodrome.n.1.回文(顺读和倒读都一样的词、短语、诗句等，如：radar， rotator) 2.【生物化学】回文节，回文结构；旋转对称https://leetcode-cn.com/problems/valid-palindrome/Given a string, determine if it is a palindrome, considering only alphanumer...

Given an array A of positive integers, A[i] represents the value of the i-th sightseeing spot, and twosightseeing spots i and jhave distance j - ibetween them.The scoreof a pair (i < j) of sightseeing spots is (A[i] + A[j] + i- j) : the sum of th...

--- 真正的勇士敢于直面菜逼的自己 Write a function to find the longest common prefix string amongst an array of strings.If there is no common prefix, return an empty string "".Example 1:Input: ["flower","flow","flight"]Output: "fl"Example 2:Explanation...

https://leetcode-cn.com/problems/3sum/Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets(三个一组) in the array which gives the sum of zero.Note:The solution set must not contain duplic

https://leetcode.com/problems/two-sum/Given an array of integers, returnindicesof the two numbers such that they add up to a specific target.You may assume that each input would haveexactlyone...

https://leetcode.com/problems/longest-substring-without-repeating-characters/Given a string, find the length of thelongest substringwithout repeating characters.Example 1:Input: "abcabcbb"Ou...