Blue___Ocean的专栏

Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. Note: For the purpose of this problem, we define empty string as valid palindrome.   Ex...

转载请注明出处，谢谢：https://blog.youkuaiyun.com/blue___ocean/article/details/80989892 本娃子最近突然想到了一个提升代码能力的方法，故事是这样的： 有一天，本娃子在上班，突然感觉特别困，然后我就去牛客网上逛去了，看到那些大神面试被挂，问的问题都好高大上，本娃子一题也不会，立马就慌了，也不困了，接着就在牛客网上现做了25道选择...

Question: Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not us...

Question:   Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function twoSum should return indices of th...

Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Example 1: Input: haystack = "hello", needle = "ll" Output: 2 Example 2: Input: haystack...

Given an input string, reverse the string word by word. Example:   Input: "the sky is blue", Output: "blue is sky the". Note: A word is defined as a sequence of non-space characters. Input stri...