| 0703 | Kth Largest Element in a Stream LeetCode 0703 Tree, Design, Binary Search Tree, Binary Tree, Data Stream, Heap (Priority Queue) | Easy | | |
| 0347 | Top K Frequent Elements LeetCode 0347 Array, Hash Table, Divide and Conquer, Bucket Sort, Counting, Quick Select, Sorting, Heap (Priority Queue) | Medium | | |
| 0451 | Sort Characters By Frequency LeetCode XXXX Hash Table, String, Bucket Sort, Counting, Sorting, Heap (Priority Queue) | Medium | | |
| 0973 | K Closest Points to Origin LeetCode XXXX Geometry, Array, Math, Divide and Conquer, Quick Select, Sorting, Heap (Priority Queue) | Medium | | |
| 1296 | Divide Array in Sets of K Consecutive Numbers LeetCode XXXX Greedy, Array, Hash Table, Sorting | Medium | | |
| 0239 | Sliding Window Maximum LeetCode 0239 Queue, Array, Sliding Window, Monotonic Queue, Heap (Priority Queue) | Hard | | |
| 0295 | Find Median from Data Stream LeetCode 0295 Design, Two Pointers, Data Stream, Sorting, Heap (Priority Queue) | Hard | | |
| 0023 | Merge k Sorted Lists LeetCode XXXX Linked List, Divide and Conquer, Heap (Priority Queue), Merge Sort | Hard | | |
| 0218 | The Skyline Problem LeetCode 0218 Fenwick Tree, Segment Tree, Array, Divide and Conquer, Ordered Set, Sweep Line, Heap (Priority Queue) | Hard | | |