Time:2019/4/23Title: Reverse Linked ListDifficulty: EasyAuthor: 小鹿 题目:Reverse Linked List(反转链表) Reverse a singly linked list. Example: {代码...} Follow up: A linked list can be reversed either iteratively or recursively. Could you implement both? Solve: ▉ 问题分析 1)反转链表的我们第...
The function first discards as many whitespace characters as necessary until the first non-whitespace character is found. Then, starting from this character, takes an optional initial plus or minus sign followed by as many numerical digits as possible, and interprets them as a numerical value.
To represent a cycle in the given linked list, we use an integer pos which represents the position (0-indexed) in the linked list where tail connects to. If pos is -1, then there is no cycle in the linked list.
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 in the array which gives the sum of zero.
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 use the same element twice.