Leetcode 588 Problem

Design an in-memory file system to support the creation of paths, adding content to files, and reading file content. The operations to support are: Create a path. Add content to a file. Read content from a file. Example: Input: commands = ["mkdir", "/a/b/c", "addContentToFile", "/a/b/c/d", "hello", "readContentFromFile", "/a/b/c/d"] Output: [null, null, "hello"] Explanation: In the sequence of file system commands: - "mkdir /a/b/c" creates a path named "/a/b/c". - "addContentToFile /a/b/c/d, hello" adds the file content "hello" at file path "/a/b/c/d". - "readContentFromFile /a/b/c/d" returns the content of the file path "/a/b/c/d", which is "hello". Example Input mkdir /a/b/c addContentToFile /a/b/c/d hello readContentFromFile /a/b/c/d