Design a Stack With Increment Operation (MEDIUM) — Array, Stack, Design
Trapping Rain Water (HARD) — Array, Two Pointers, Dynamic Programming, Stack, Monotonic Stack
Meeting Rooms II (MEDIUM) — Array, Two Pointers, Greedy, Sorting, Heap (Priority Queue), Prefix Sum
Single Element in a Sorted Array (MEDIUM) — Array, Binary Search
Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit (MEDIUM) — Array, Queue, Sliding Window, Heap (Priority Queue), Ordered Set, Monotonic Queue
Number of Islands (MEDIUM) — Array, Depth-First Search, Breadth-First Search, Union Find, Matrix
