Heap (Priority Queue)

Medium | Array, Queue, Sliding Window, Heap (Priority Queue), Ordered Set, Monotonic Queue

Hard | Array, Binary Search, Heap (Priority Queue), Matrix

Medium | Array, Hash Table, Binary Search, Greedy, Heap (Priority Queue)

Medium | Array, Hash Table, Greedy, Sorting, Heap (Priority Queue)

Hard | Array, Breadth-First Search, Heap (Priority Queue), Matrix

Hard | Array, Hash Table, Sliding Window, Heap (Priority Queue)

Hard | Array, Hash Table, Greedy, Sliding Window, Sorting, Heap (Priority Queue)

Medium | Array, Hash Table, String, Trie, Sorting, Heap (Priority Queue), Bucket Sort, Counting

Medium | Array, Math, Divide and Conquer, Geometry, Sorting, Heap (Priority Queue), Quickselect

Easy | Array, Math, Heap (Priority Queue), Simulation