upd

algorithms/labs/lab6/leetcode/2/link.txt

@@ -0,0 +1 @@
+https://leetcode.com/problems/longest-valid-parentheses/submissions/1769090768/?envType=problem-list-v2&envId=dynamic-programming

algorithms/labs/lab6/leetcode/2/solution.py

@@ -0,0 +1,15 @@
+class Solution:
+    def longestValidParentheses(self, s: str) -> int:
+        n = len(s)
+        dp = [0] * n
+        best = 0
+        for i in range(1, n):
+            if s[i] == ")":
+                if s[i - 1] == "(":
+                    dp[i] = (dp[i - 2] if i >= 2 else 0) + 2
+                elif i - dp[i - 1] - 1 >= 0 and s[i - dp[i - 1] - 1] == "(":
+                    dp[i] = dp[i - 1] + 2
+                    if i - dp[i - 1] - 2 >= 0:
+                        dp[i] += dp[i - dp[i - 1] - 2]
+                best = max(best, dp[i])
+        return best