diff --git a/contents/algorithms/array.md b/contents/algorithms/array.md
index b7186c9b..c9a01579 100644
--- a/contents/algorithms/array.md
+++ b/contents/algorithms/array.md
@@ -48,3 +48,7 @@ When you are given two arrays to process, it is common to have one index per arr
 - [3Sum](https://leetcode.com/problems/3sum/)
 - [Container With Most Water](https://leetcode.com/problems/container-with-most-water/)
 - [Sliding Window Maximum](https://leetcode.com/problems/sliding-window-maximum/)
+## Complexity
+
+- Access O(1)
+- Search , Insertion , Deletion  O(N)