Reverse Linked List 2 - between m and n

Problem Reverse a linked list from position m to n. Do it in-place and in one-pass. OR Given the head of a singly linked list and two integers left and right where left <= right, reverse the nodes of the list from position left to position right, and return the reversed list. Examples Example 1: --- title: Input --- graph LR A1[1] --> B2[2]:::reversed --> C3[3]:::reversed --> D4[4]:::reversed --> E5[5] classDef reversed fill:#ffcc00,stroke:#000,stroke-width:2px; ...

Encode and Decode TinyURL Problem

Problem Note: This is a companion problem to the System Design problem: Design TinyURL. TinyURL is a URL shortening service where you enter a URL such as https://leetcode.com/problems/design-tinyurl and it returns a short URL such as http://tinyurl.com/4e9iAk. Design a class to encode a URL and decode a tiny URL. There is no restriction on how your encode/decode algorithm should work. You just need to ensure that a URL can be encoded to a tiny URL and the tiny URL can be decoded to the original URL. ...

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