Create 0219-contains-duplicate-ii.py

Author: neetcode-gh

python/0219-contains-duplicate-ii.py

@@ -0,0 +1,13 @@
+class Solution:
+    def containsNearbyDuplicate(self, nums: List[int], k: int) -> bool:
+        window = set()
+        L = 0
+
+        for R in range(len(nums)):
+            if R - L > k:
+                window.remove(nums[L])
+                L += 1
+            if nums[R] in window:
+                return True
+            window.add(nums[R])
+        return False