g1201_1300.s1233_remove_sub_folders_from_the_filesystem

Class Solution

java.lang.Object

g1201_1300.s1233_remove_sub_folders_from_the_filesystem.Solution

public class Solution
extends Object

1233 - Remove Sub-Folders from the Filesystem.

Medium

Given a list of folders folder, return the folders after removing all sub-folders in those folders. You may return the answer in any order.

If a folder[i] is located within another folder[j], it is called a sub-folder of it.

The format of a path is one or more concatenated strings of the form: '/' followed by one or more lowercase English letters.

• For example, "/leetcode" and "/leetcode/problems" are valid paths while an empty string and "/" are not.

Example 1:

Input: folder = [“/a”,“/a/b”,“/c/d”,“/c/d/e”,“/c/f”]

Output: [“/a”,“/c/d”,“/c/f”]

Explanation: Folders “/a/b” is a subfolder of “/a” and “/c/d/e” is inside of folder “/c/d” in our filesystem.

Example 2:

Input: folder = [“/a”,“/a/b/c”,“/a/b/d”]

Output: [“/a”]

Explanation: Folders “/a/b/c” and “/a/b/d” will be removed because they are subfolders of “/a”.

Example 3:

Input: folder = [“/a/b/c”,“/a/b/ca”,“/a/b/d”]

Output: [“/a/b/c”,“/a/b/ca”,“/a/b/d”]

Constraints:

• 1 <= folder.length <= 4 * 104
• 2 <= folder[i].length <= 100
• folder[i] contains only lowercase letters and '/'.
• folder[i] always starts with the character '/'.
• Each folder name is unique.

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
List<String>	removeSubfolders(String[] folder)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

removeSubfolders

public List<String> removeSubfolders(String[] folder)