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:
The simplified canonical path should follow these rules:
Return the simplified canonical path.
Examples
Example 1
Input: path = "/home/"
Output: "/home"
Explanation:
The trailing slash should be removed.
Example 2
Input: path = "/home//foo/"
Output: "/home/foo"
Explanation:
Multiple consecutive slashes are replaced by a single one.
Example 3
Input: path = "/home/user/Documents/../Pictures"
Output: "/home/user/Pictures"
Explanation:
A double period ".." refers to the directory up a level (the parent directory).
Example 4
Input: path = "/../"
Output: "/"
Explanation:
Going one level up from the root directory is not possible.
Example 5
Input: path = "/.../a/../b/c/../d/./"
Output: "/.../b/d"
Explanation:
"..." is a valid name for a directory in this problem.
Constraints
1 <= path.length <= 3000
path consists of English letters, digits, period '.', slash '/' or '_'.
path is a valid absolute Unix path.
71. Simplify Path
Medium
30 Points
String
Stack
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:
The simplified canonical path should follow these rules:
Return the simplified canonical path.
Examples
Example 1
Input: path = "/home/"
Output: "/home"
Explanation:
The trailing slash should be removed.
Example 2
Input: path = "/home//foo/"
Output: "/home/foo"
Explanation:
Multiple consecutive slashes are replaced by a single one.
Example 3
Input: path = "/home/user/Documents/../Pictures"
Output: "/home/user/Pictures"
Explanation:
A double period ".." refers to the directory up a level (the parent directory).
Example 4
Input: path = "/../"
Output: "/"
Explanation:
Going one level up from the root directory is not possible.
Example 5
Input: path = "/.../a/../b/c/../d/./"
Output: "/.../b/d"
Explanation:
"..." is a valid name for a directory in this problem.
Constraints
1 <= path.length <= 3000
path consists of English letters, digits, period '.', slash '/' or '_'.