2. Sliding Window

1.Maximum Average Subarray I

2.Contains Duplicate II

3.Longest Substring Without Repeating Characters

4.Longest Repeating Character Replacement

5.Permutation in String

6.Find All Anagrams in a String

7.Minimum Size Subarray Sum

8.Max Consecutive Ones III

9.Fruit Into Baskets

10.Subarray Product Less Than K

11.Longest Subarray of 1’s After Deleting One Element

12.Maximum Points You Can Obtain from Cards

13.Minimum Operations to Reduce X to Zero

14.Minimum Window Substring

15.Sliding Window Maximum