Updated markdown files

Author: Zanger67/leetcode

markdowns/Questions_By_Code_Length.md

@@ -72,6 +72,7 @@ Calculations are based on the code files's byte sizes.
 |  959 | [Regions Cut By Slashes](<https://leetcode.com/problems/regions-cut-by-slashes>)                                                                                                           | Medium  | Daily                     | [solution](<_959. Regions Cut By Slashes.md>)                                                       | py                                          | Aug 10, 2024    |
 | 1992 | [Find All Groups of Farmland](<https://leetcode.com/problems/find-all-groups-of-farmland>)                                                                                                 | Medium  |                           | [solution](<_1992. Find All Groups of Farmland.md>)                                                 | java, py                                    | Jun 24, 2024    |
 |  142 | [Linked List Cycle II](<https://leetcode.com/problems/linked-list-cycle-ii>)                                                                                                               | Medium  |                           | [solution](<_142. Linked List Cycle II.md>)                                                         | py                                          | Jun 26, 2024    |
+|   20 | [Valid Parentheses](<https://leetcode.com/problems/valid-parentheses>)                                                                                                                     | Easy    | B75, N150                 | [solution](<_20. Valid Parentheses.md>)                                                             | java                                        | May 22, 2024    |
 | 2285 | [Maximum Total Importance of Roads](<https://leetcode.com/problems/maximum-total-importance-of-roads>)                                                                                     | Medium  | Daily                     | [solution](<_2285. Maximum Total Importance of Roads.md>)                                           | c, cpp, java, py                            | Jun 28, 2024    |
 | 1305 | [All Elements in Two Binary Search Trees](<https://leetcode.com/problems/all-elements-in-two-binary-search-trees>)                                                                         | Medium  |                           | [solution](<_1305. All Elements in Two Binary Search Trees.md>)                                     | java                                        | Jun 24, 2024    |
 |  143 | [Reorder List](<https://leetcode.com/problems/reorder-list>)                                                                                                                               | Medium  | B75, N150                 | [solution](<_143. Reorder List.md>)                                                                 | java, py                                    | Jun 11, 2024    |
@@ -168,7 +169,6 @@ Calculations are based on the code files's byte sizes.
 |  919 | [Complete Binary Tree Inserter](<https://leetcode.com/problems/complete-binary-tree-inserter>)                                                                                             | Medium  |                           | [solution](<_919. Complete Binary Tree Inserter.md>)                                                | py                                          | Jul 05, 2024    |
 |  271 | [Encode and Decode Strings](<https://leetcode.com/problems/encode-and-decode-strings>)                                                                                                     | Medium  | B75, N150                 | [solution](<_271. Encode and Decode Strings.md>)                                                    | py                                          | Jun 13, 2024    |
 |   24 | [Swap Nodes in Pairs](<https://leetcode.com/problems/swap-nodes-in-pairs>)                                                                                                                 | Medium  |                           | [solution](<_24. Swap Nodes in Pairs.md>)                                                           | c                                           | Jun 07, 2024    |
-|   20 | [Valid Parentheses](<https://leetcode.com/problems/valid-parentheses>)                                                                                                                     | Easy    | B75, N150                 | [solution](<_20. Valid Parentheses.md>)                                                             | java                                        | May 22, 2024    |
 | 1268 | [Search Suggestions System](<https://leetcode.com/problems/search-suggestions-system>)                                                                                                     | Medium  |                           | [solution](<_1268. Search Suggestions System.md>)                                                   | py                                          | Jun 29, 2024    |
 |    1 | [Two Sum](<https://leetcode.com/problems/two-sum>)                                                                                                                                         | Easy    | B75, N150                 | [solution](<_1. Two Sum.md>)                                                                        | java, py                                    | May 22, 2024    |
 |  622 | [Design Circular Queue](<https://leetcode.com/problems/design-circular-queue>)                                                                                                             | Medium  |                           | [solution](<_622. Design Circular Queue.md>)                                                        | py                                          | Jul 06, 2024    |

markdowns/_20. Valid Parentheses.md

@@ -8,7 +8,7 @@
 
 > *First completed : May 22, 2024*
 >
-> *Last updated : July 01, 2024*
+> *Last updated : March 12, 2025*
 
 ------
 
@@ -20,8 +20,45 @@
 
 ## Solutions
 
+- [e20 v2.java](<../my-submissions/e20 v2.java>)
 - [e20.java](<../my-submissions/e20.java>)
 ### Java
+#### [e20 v2.java](<../my-submissions/e20 v2.java>)
+```Java
+
+class Solution {
+    public boolean isValid(String s) {
+        Stack<Character> temp = new Stack<>();
+
+        for (Character c : s.toCharArray()) {
+            switch (c) {
+                case '[' :
+                case '{' :
+                case '(' :
+                    temp.push(c);
+                    break;
+                case ']' :
+                    if (temp.isEmpty() || temp.pop() != '[')
+                        return false;
+                    break;
+                case '}' :
+                    if (temp.isEmpty() || temp.pop() != '{')
+                        return false;
+                    break;
+                case ')' :
+                    if (temp.isEmpty() || temp.pop() != '(')
+                        return false;
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        return temp.isEmpty();
+    }
+}
+```
+
 #### [e20.java](<../my-submissions/e20.java>)
 ```Java
 class Solution {