add file

AldythNahak · AldythNahak · commit 1f43b4a70d39 · 2025-05-20T22:46:25.000+07:00
diff --git a/Hard/longest_valid_parentheses/longest_valid_parentheses.java b/Hard/longest_valid_parentheses/longest_valid_parentheses.java
@@ -0,0 +1,21 @@
+package longest_valid_parentheses;
+
+class Solution {
+    public int longestValidParentheses(String s) {
+        // int 
+        
+    }
+}
+
+public class longest_valid_parentheses {
+    public static void main(String[] args) {
+        Solution solution = new Solution();
+
+            System.out.println(solution.longestValidParentheses("(()")); //2
+    System.out.println(solution.longestValidParentheses(")()())")); //4
+    System.out.println(solution.longestValidParentheses("")); //0
+    System.out.println(solution.longestValidParentheses("()(()")); //2
+    System.out.println(solution.longestValidParentheses("()(())")); //6
+    System.out.println(solution.longestValidParentheses("()")); //6
+    }
+}
