diff --git a/medium/longest_nice_subarray.py b/medium/longest_nice_subarray.py
new file mode 100644
index 0000000..b1be81d
--- /dev/null
+++ b/medium/longest_nice_subarray.py
@@ -0,0 +1,17 @@
+# https://leetcode.com/problems/longest-nice-subarray
+
+from typing import List
+
+class Solution:
+    def longestNiceSubarray(self, nums: List[int]) -> int:
+        left = 0
+        or_mask = 0
+        result = 0
+        for right in range(len(nums)):
+            while (or_mask & nums[right]) != 0:
+                or_mask ^= nums[left]
+                left += 1
+            or_mask |= nums[right]
+            result = max(result, right - left + 1)
+        return result
+