Articles tagged with Hard

• Greatest Common Divisor Traversal - Prime graph connectivity, published 2024-02-25
• Find All People With Secret - UnionFind and Min-Heap solutions, published 2024-02-25
• Cherry Pickup II - Clear concise 2D DP, published 2024-02-11
• Number of Submatrices That Sum to Target - Subarray target sum properly explained, published 2024-01-28
• Minimum Difficulty of a Job Schedule - Simple concise code for top-down DP with intuition, published 2023-12-30
• Count of Smaller Numbers After Self - MergeSort based concise solution, published 2023-12-08
• Bus Routes - BFS solution with intuition, published 2023-11-12
• Design Graph With Shortest Path Calculator - Dijkstra and Floyd-Warshall both solutions with intuition, published 2023-11-11
• Count Vowels Permutation - Simple DP, published 2023-10-28
• Constrained Subsequence Sum - Sliding window DP with heap, published 2023-10-21
• Parallel Courses III - Process in topological order, published 2023-10-20
• Parallel Courses II - DFS + DP + Bitmasking, published 2023-10-20
• Valid Number - DFA using hashmap, published 2023-06-15
• N-Queens - Backtracking intuition, published 2023-06-09
• Power of Heroes - One pass solution with detailed explanation, published 2023-05-20
• Permutation Sequence - Recursive + iterative solution with intuition, published 2023-05-11
• Regular Expression Matching - Recursion and memoization, published 2023-05-10
• Checking Existence of Edge Length Limited Paths - Union-Find with sorted edges and queries, published 2023-04-29
• Similar String Groups - DFS + BFS + Union-Find solutions, published 2023-04-28
• Minimize the Total Price of the Trips - DFS + DP solution with explanation, published 2023-04-27
• Restore The Array - Step-by-step recursive memoization, published 2023-04-26
• Profitable Schemes - Memoization step by step, published 2023-04-24
• Maximum Value of K Coins From Piles - Bottom-up DP explained, published 2023-04-15
• Put Marbles in Bags - 2 Heap solution with explaination, published 2023-02-17
• Naming a Company - HashSet for all letters, published 2023-02-09
• Subarrays with K Different Integers - Sliding window + HashMap, published 2023-02-07
• Word Break II - Word Break extension (DP), published 2023-01-27
• Concatenated Words - Word Break extension (DP), published 2023-01-27
• Human Traffic of Stadium - Hacky solution, published 2022-12-01
• Department Top Three Salaries - Dense rank, published 2022-12-01
• Paths in Matrix Whose Sum Is Divisible by K - 3D DP table, published 2022-11-30
• Maximum Profit in Job Scheduling - [Explained + Example] DP (Knapsack)+ OOP Faster than 97%, published 2022-11-26
• Word Search II - [Explained] Trie + DFS Clean C++ code, published 2022-11-16
• Reverse Nodes in k-Group - Well explained solution in easy way, published 2022-10-25
• Shortest Common Supersequence - DP LCS variations, published 2022-09-27
• Trapping Rain Water - Easy method, published 2022-04-16
• Find Median from Data Stream - Classical solution two heaps, published 2022-03-29
• Merge k Sorted Lists - Min heap solution, published 2022-02-05
• Maximum Good People Based on Statements - [C++,Java,Python] Detailed easy to understand bitmask, published 2022-01-25