Serialization is the process of converting a data structure or object into a sequence of bits so that i…

题目 31. 数组划分 给出一个整数数组 nums 和一个整数 k。划分数组（即移动数组 nums 中的元素），使得： 所有小于k的元素移到左边 所有大于等于k的元素移到右边 返回数组划分的位置，即数组中第一个位置 i，…

  Given a positive integer num, write a function which returns True if num is a perfect square else False…

  Given a non-empty string s and an abbreviation abbr, return whether the string…

  In this problem, your job to write a function to check whether a input string is a valid IPv4 address o…

题目： Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers…

Largest Number Given a list of non negative integers, arrange them such that they form the largest number. For…

  LeetCode 方法详解

  Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1&n…

   There is a fence with n posts, each post can be painted with one of the k colors. You have to pai…

  Given a group of two strings, you need to find the longest uncommon subsequence of this group of two st…

题目： Merge  k  sorted linked lists and return it as one sorted list. Analyze and describe its complex…