Simplify Path
You are given an absolute path for a Unix-style file system, which always begins with a slash '/'. Your task is to transform this absolute path into its simplified canonical path.
The rules of a Unix-style file system are as follows:
A single period
'.'represents the current directory.A double period
'..'represents the previous/parent directory.Multiple consecutive slashes such as
'//'and'///'are treated as a single slash'/'.Any sequence of periods that does not match the rules above should be treated as a valid directory or file name. For example,
'...'and'....'are valid directory or file names.
The simplified canonical path should follow these rules:
The path must start with a single slash
'/'.Directories within the path must be separated by exactly one slash
'/'.The path must not end with a slash
'/', unless it is the root directory.The path must not have any single or double periods (
'.'and'..') used to denote current or parent directories.
Return the simplified canonical path.
Example 1:
Input: path = "/neetcode/practice//...///../courses"
Output: "/neetcode/practice/courses"Example 2:
Input: path = "/..//"
Output: "/"Example 3:
Input: path = "/..//_home/a/b/..///"
Output: "/_home/a"Constraints:
1 <= path.length <= 3000pathconsists of English letters, digits, period'.', slash'/'or'_'.pathis a valid absolute Unix path.