Challenge 8 - Filtering Redundant Folder References

Challenge 8: Filtering Redundant Folder References<br /><br />Level: Medium<br /><br />Description: You are reorganizing a data warehouse in your company, working with a filesystem that creates parent folders if you give it a reference for a child folder. For example, if you ask the filesystem to create “folder1/folder2” and neither folder1 or folder2 exist, it will create both, with folder2 inside folder1, without raising an error. Given a list of folders, you want to keep only the longest unique child folders, filtering out references to parent folders that will be generated anyway for efficiency.<br /><br />Here's an example of an initial list of folders:<br /><br />- folder1/folder3<br />- folder1/folder3/folder22<br />- folder1/folder3/folder22/folder47<br /><br />After executing your workflow, the list above should only contain a reference for folder1/folder3/folder22/folder47.