题目 Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set. get(key) - Get the value (will always be positive) of the key if the key exists in the cache, otherwise return -1.…

描述 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] 解法一 要解该题,只需要在上一题(leetcode解题报告(1):Remove Dupli…

206.反转链表 1.题目描述 反转一个单链表. 示例: 输入: 1->2->3->4->5->NULL输出: 5->4->3->2->1->NULL 进阶:你可以迭代或递归地反转链表.你能否用两种方法解决这道题? 2.解题报告 思路1:借助栈 利用栈先进后出的特点,将每个节点按顺序存入栈中,再从顶到底连接栈中的每个节点 注意要将翻转后的最后一个节点(即原链表的第一个节点)的next置为nullptr,不然后果可想而知~ 思路2:就地操作(推荐)…

LeetCode解题报告:Linked List Cycle && Linked List Cycle II 1题目 Linked List Cycle Given a linked list, determine if it has a cycle in it. Follow up: Can you solve it without using extra space? Linked List Cycle II Given a linked list, return the node w…

2021字节跳动校招秋招算法面试真题解题报告--leetcode19 删除链表的倒数第 n 个结点,内含7种语言答案 1.题目描述 给你一个链表,删除链表的倒数第 n 个结点,并且返回链表的头结点. 进阶:你能尝试使用一趟扫描实现吗? 2.解题报告 在对链表进行操作时,一种常用的技巧是添加一个哑节点(dummy node),它的 \textit{next}next 指针指向链表的头节点.这样一来,我们就不需要对头节点进行特殊的判断了. 例如,在本题中,如果我们要删除节点 yy,我们需要知道节点…

最近在准备找工作的算法题,刷刷LeetCode,以下是我的解题报告索引,每一题几乎都有详细的说明,供各位码农参考.根据我自己做的进度持续更新中......                              本文地址 LeetCode:Reverse Words in a String LeetCode:Evaluate Reverse Polish Notation LeetCode:Max Points on a Line LeetCode:Sort List LeetCode:Ins…

LRU Cache Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set. get(key) - Get the value (will always be positive) of the key if the key exists in the cache, otherwise retu…

1. Search in Rotated Sorted Array Suppose an array sorted in ascending order is rotated(轮流,循环) at some pivot(枢轴; 中心点) unknown to you beforehand(提前; 事先). (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target value to search. If foun…

1. 1-bit and 2-bit Characters We have two special characters. The first character can be represented by one bit 0. The second character can be represented by two bits (10 or 11). Now given a string represented by several bits. Return whether the last…

题目一: Longest Substring Without Repeating Characters Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeating letters for "abcabcbb" is "abc", which the…