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摘要： 算法描述： Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. k is a positive integer and is less than or eq 阅读全文

摘要： 算法描述： Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. Example: 解题思路：分治法。 阅读全文

摘要： 算法描述： Given an input string (s) and a pattern (p), implement regular expression matching with support for '.' and '*'. The matching should cover the e 阅读全文

摘要： 算法描述： There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run time complex 阅读全文

摘要： 算法描述： Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., [0,1,2,4,5,6,7] might become [4,5,6,7,0,1, 阅读全文

摘要： 算法描述： Given an integer array nums, find the contiguous subarray within an array (containing at least one number) which has the largest product. Exampl 阅读全文

摘要： 算法描述： Given an input string, reverse the string word by word. Example: Note: A word is defined as a sequence of non-space characters. Input string may 阅读全文

摘要： 算法描述： Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, /. Each operand may be an integer or ano 阅读全文

摘要： 算法描述： Sort a linked list in O(n log n) time using constant space complexity. Example 1: Example 2: 解题思路：时间复杂度O(nlogn)。写了快排感觉很奇怪，看了其他人答案，发现都是归并排序。 快排代码 阅读全文

摘要： 算法描述： Sort a linked list using insertion sort. A graphical example of insertion sort. The partial sorted list (black) initially contains only the firs 阅读全文