Sorting

1.Easy

(169)Majority Element

2.Medium

(31)Next Permutation

(56)Merge Intervals

(148)Sort List

(215)Kth Largest Element in an Array

(253)Meeting Rooms II

(347)Top K Frequent Elements

(406)Queue Reconstruction by Height

(581)Shortest Unsorted Continuous Subarray

(621)Task Scheduler