October-leetcode-challenge-2020 The repository contains the solutions in java programming language. Solution in any other language will be accepted in the pull request. 1.Number of Recent Calls (Easy) 2.Combination Sum (Medium) 3.K-diff pairs in an array (Medium) 4.Remove covered Intervals (Medium) 5.Complement of Base 10 Integer (Easy) 6.Insert into a Binary Search (Medium) 7.Rotate List (Medium) 8.Binary Search (Easy) 9.Serialize and Deserialize BST (Medium) 10.Minimum Number of Arrows to Burst Balloons (Medium) 11.Remove Duplicate Letters (Medium) 12.Buddy Strings (Easy) 13.Sort List (Medium) 14.House Robber II (Medium) 15.Rotate Array (Medium)