Heap (Priority Queue)

Hard | Graph Theory, Heap (Priority Queue), Shortest Path

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

Medium | Array, Binary Search, Breadth-First Search, Union-Find, Heap (Priority Queue), Matrix

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

Hard | Array, Greedy, Sorting, Heap (Priority Queue), Matrix

Hard | Array, Binary Search, Stack, Binary Indexed Tree, Segment Tree, Heap (Priority Queue), Monotonic Stack

Medium | Array, Dynamic Programming, Queue, Heap (Priority Queue), Monotonic Queue

Hard | Bit Manipulation, Graph Theory, Heap (Priority Queue), Enumeration, Shortest Path

Medium | Hash Table, Design, Heap (Priority Queue), Data Stream, Ordered Set

Medium | Array, Binary Search, Dynamic Programming, Sorting, Heap (Priority Queue)