/*71. Simplify Path My Submissions Question
Total Accepted: 44962 Total Submissions: 211834 Difficulty: Medium
Given an absolute path for a file (Unix-style), simplify it.
For example,
path = "/home/", => "/home"
path = "/a/./b/../../c/", => "/c" */
import java.util.*;
public class SimplifyPath {
public static String simplifyPath(String path) {
// The main idea is to push to the stack every valid file name (not in {"",".",".."}), popping only if there's smth to pop and we met "..".
// https://leetcode.com/discuss/22592/java-10-lines-solution-with-stack
Deque<String> stack = new LinkedList<>();
Set<String> skip = new HashSet<>(Arrays.asList("..", ".", ""));
for (String dir : path.split("/")) {
if (dir.equals("..") && !stack.isEmpty()) stack.pop();
else if (!skip.contains(dir)) stack.push(dir);
}
String res = "";
for (String dir : stack) res = "/" + dir + res;
return res.isEmpty() ? "/" : res;
}
public static void main(String[] args) {
//String path = "/home/";
String path = "/a/b/../.././c/";
String res = simplifyPath(path);
System.out.printf("res = %s", res);
}
}
71. Simplify Path My Submissions Question
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