clnsx

摘要： 题目内容 Write a function that takes an unsigned integer and return the number of '1' bits it has (also known as the Hamming weight). Example: 分析过程 题目归类： 阅读全文

摘要： 题目内容 Reverse bits of a given 32 bits unsigned integer. Example: 分析过程 题目归类： 2进制 题目分析： 对于2进制需要了解补码反码左移右移逻辑右移和算术右移等操作。 todo 各种码分析 边界分析： 空值分析 循环边界分析 需要了解到 阅读全文

摘要： 题目内容 The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed 阅读全文

摘要： 题目内容 Given a string s, find the longest palindromic subsequence's length in s. You may assume that the maximum length of s is 1000. Example: 分析过程 题目归类 阅读全文

摘要： 题目内容 Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. Example: 分析过程 题目归类： array,dp 阅读全文

摘要： 题目内容 Given an array A of positive integers, call a (contiguous, not necessarily distinct) subarray of A good if the number of different integers in th 阅读全文

摘要： 题目内容 Given a string, find the length of the longest substring without repeating characters. Example: 分析过程 题目归类： array，遍历，dp 题目分析： 找到连续字串，输出最长的没有重复字母的连 阅读全文

摘要： 题目内容 Given two non negative integers num1 and num2 represented as strings, return the product of num1 and num2, also represented as a string. Example: 阅读全文

摘要： 题目内容 You are given two non empty linked lists representing two non negative integers. The most significant digit comes first and each of their nodes c 阅读全文

摘要： 题目内容 You are given two non empty linked lists representing two non negative integers. The digits are stored in reverse order and each of their nodes c 阅读全文