package LeetCode_71 import java.util.* /** * 71. Simplify Path * https://leetcode.com/problems/simplify-path/description/ * * Example 5: Input: "/a/../../b/../c//.//" Output: "/c" Example 6: Input: "/a//b////c/d//././/.." Output: "/a/b/c" * */ class Solution { fun simplifyPath(path: String): String { if (path.equals("")) { return path } val stack = Stack<String>() val list = path.split("/") for (item in list) { if (item != "." && item != ".." && item != "") { stack.push(item) } else if (stack.isNotEmpty() && item == "..") { stack.pop()//remove the top element while meet two point } } return "/" + stack.joinToString("/") } }