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This approach utilizes a stack data structure to process the path components. By splitting the path on the '/' character, we collect the different components of the path. Using a stack helps efficiently manage directory movement due to '..'. For every directory name, it is pushed to the stack, for '..' we pop from the stack, and '.' is simply ignored. After processing all components, we join the names in the stack with '/' to form the simplified canonical path.
Time Complexity: O(N) where N is the length of the path string, as we perform operations linearly along the string.
Space Complexity: O(N) because we use a stack that can contain each part of the path in the worst case.
1using System;
2using System.Collections.Generic;
3
4public class Solution {
5 public string SimplifyPath(string path) {
6 Stack<string> stack = new Stack<string>();
7 string[] components = path.Split('/', StringSplitOptions.RemoveEmptyEntries);
8
9 foreach (string component in components) {
10 if (component == "..") {
11 if (stack.Count > 0) {
12 stack.Pop();
13 }
14 } else if (component != ".") {
15 stack.Push(component);
16 }
17 }
18
19 List<string> result = new List<string>(stack);
20 result.Reverse();
21 return "/" + string.Join("/", result);
22 }
23}In C#, the solution uses a Stack to track the path components. We split the path and iteratively handle each component based on Unix path rules. Results are built by reversing and joining stack elements into the canonical path string prefixed with '/'.
This approach optimizes the simplification process using string handling techniques without explicitly using stack structures. It involves maintaining a result string directly, with an index pointer to simulate stack behavior. Iterating over path components allows addition, removal, or skipping of segments based on path rules, with a focus on reducing stack overhead. Finally, the result string is reconstructed as the simplified path.
Time Complexity: O(N) as parsing occurs once through entire path.
Space Complexity: O(N) utilized for the resultant path string (no explicit stack).
1
JavaScript employs simplification by managing component paths within an array, bypassing explicit stack structures. Leveraging native string functions efficiently simplifies the path through component judicious weighing.