Update Reverse String - Leetcode 344.py

Author: rai-abhi24

Reverse String - Leetcode 344.py

@@ -6,7 +6,11 @@ def reverseString(self, s: List[str]) -> None:
         n = len(s)
         l = 0
         r = n - 1
+
         while l < r:
             s[l], s[r] = s[r], s[l]
             l += 1
-            r -= 1
+            r -= 1
+
+# Time Complexity: O(n)
+# Space Complexity: O(1)