Leetcode 1499. Max Value of Equation (monotonic queue)
Leetcode 819. Most Common Word (list groups)
Leetcode 1392. Longest Happy Prefix (kmp)
Leetcode 1563. Stone Game V (game theory)
Leetcode 893. Groups of Special-Equivalent Strings (greedy)
Leetcode 96. Unique Binary Search Trees (dfs + memo)
Leetcode 2192. All Ancestors of a Node in a Directed Acyclic Graph (topological sort)
Leetcode 876. Middle of the Linked List (linked list slow fast pointer)
Leetcode 3393. Count Paths With the Given XOR Value (grid dp)
Leetcode 284. Peeking Iterator (design)
Leetcode 127. Word Ladder (bfs + set)
Leetcode 844. Backspace String Compare (two pointers)
Leetcode 1293. Shortest Path in a Grid with Obstacles Elimination (grid bfs)
Leetcode 503. Next Greater Element II (monotonic stack)
Leetcode 407. Trapping Rain Water II (bfs and heap)
Leetcode 2718. Sum of Matrix After Queries (offline query)
Leetcode 3180. Maximum Total Reward Using Operations I (01 knapsack)
Leetcode 2606. Find the Substring With Maximum Cost (max subarray sum dp)
Leetcode 300. Longest Increasing Subsequence (LIS two method O(nlogn) and O(n^2))
Leetcode 5. Longest Palindromic Substring (2 method: center spreading and dp)
Leetcode 3044. Most Frequent Prime (number theory)
