1.题目 26. Remove Duplicates from Sorted Array--Easy Given a sorted array nums, remove the duplicates in-place such that each element appear only once and return the new length. Do not allocate extra space for another array, you must do this by modifyi…

Merge k sorted linked lists and return it as one sorted list. Analyze and describe its complexity. 题解:最开始用了最naive的方法,每次在k个链表头中找出最小的元素,插入到新链表中.结果果断TLE了. 分析一下,如果这样做,每取出一个节点,要遍历k个链表一次,假设k个链表一共有n个节点,那么就需要O(nk)的时间复杂度. 参考网上的代码,找到了用最小堆的方法.维护一个大小为k的最小堆,存放当前k…

Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. For example,Given 1->2->3->3->4->4->5, return 1->2->5.Given 1->1->1->2->3, return 2->3.…

1. Remove Duplicates from Sorted List 题目链接 题目要求: Given a sorted linked list, delete all duplicates such that each element appear only once. For example, Given 1->1->2, return 1->2. Given 1->1->2->3->3, return 1->2->3. 这道题不难.具体程序…

描述 Follow up for "Remove Duplicates": What if duplicates are allowed at most twice? 示例 Given sorted array nums = [1,1,1,2,2,3], Your function should return length = 5, with the first five elements of nums being 1, 1, 2, 2 and 3. It doesn't matte…

描述 Given a sorted array, remove the duplicates in-place such that each element appear only once and return the new length. Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory. 示…

83. Remove Duplicates from Sorted List Total Accepted: 94387 Total Submissions: 264227 Difficulty: Easy 题目意思:如今有一个已经排好顺序的链表,删除全部反复的节点.使每一个节点都仅仅出现一次! Given a sorted linked list, delete all duplicates such that each element appear only once. For exampl…

主要用于记录在LeetCode刷题的过程中学习到的一些思想和自己的想法,希望通过leetcode提升自己的编程素养 :p 高效leetcode刷题小诀窍(这只是目前对我自己而言的小方法,之后会根据自己的切身经历更新): 算法不是纯粹拼智商的,智商高,就一定很厉害,不够聪明,就一定不行.算法是一种技能,是可以通过科学合理的方式训练出来的能力.目前国内大厂的算法考察,基本不会超过leetcode 中等难度,上限难度基本都是leetcode 中等题里面的中等难度 基本的算法数据结构是有限的.比如说链表…

Follow up for "Remove Duplicates":What if duplicates are allowed at most twice? For example,Given sorted array A = [1,1,1,2,2,3], Your function should return length = 5, and A is now [1,1,2,2,3]. 题解: 设置两个变量:右边kepler和前向游标forward.如果当前kepeler所指的元素和…

本人算法还是比较菜的,因此大部分在刷基础题,高手勿喷 选择Python进行刷题,因为坑少,所以不太想用CPP: 1.买股票的最佳时期2 给定一个数组,它的第 i 个元素是一支给定股票第 i 天的价格. 设计一个算法来计算你所能获取的最大利润.你可以尽可能地完成更多的交易(多次买卖一支股票). 注意:你不能同时参与多笔交易(你必须在再次购买前出售掉之前的股票). 思路:买高不买低,向上即可 class Solution(object): def maxProfit(self, prices): "…