diff --git a/longest_valid_parentheses/solution.py b/longest_valid_parentheses/solution.py
new file mode 100644
index 0000000..2d5e908
--- /dev/null
+++ b/longest_valid_parentheses/solution.py
@@ -0,0 +1,16 @@
+class Solution(object):
+    def longestValidParentheses(self, s: str) -> int:
+        stack = [-1]
+        max_len = 0
+
+        for i in range(len(s)):
+            if s[i] == '(':
+                stack.append(i)
+            else:
+                stack.pop()
+                if len(stack) == 0:
+                    stack.append(i)
+                else:
+                    max_len = max(max_len, i - stack[-1])
+
+        return max_len
\ No newline at end of file