LeetCode: Simplify Path

Given an absolute path for a file (Unix-style), simplify it.

For example,
path = "/home/", => "/home"
path = "/a/./b/../../c/", => "/c"

Corner Cases:

• Did you consider the case where path = "/../"?
  In this case, you should return "/".
• Another corner case is the path might contain multiple slashes '/' together, such as "/home//foo/".
  In this case, you should ignore redundant slashes and return "/home/foo".

Solution

Not a difficult problem, but caution needs to be exercised.
Clarify:

1. see ".", stay in the same folder
2. see ".." go back to previous folder

Use a stack to hold folder names and their relationship