Master the 0-1 Knapsack problem with clean DP semantics and understand why backwards iteration is required in space-optimized solutions. Learn the snapshot mental model that transfers to other DP problems.
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Deep dives into web development, AI engineering, and modern programming practices.
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Master LeetCode problem 96 using dynamic programming to count unique BST structures. Learn the elegant divide-and-conquer approach, understand Catalan numbers, and see how fixing the root node reveals recursive substructure in this classic combinatorial problem.
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Read article →Master Sudoku solving with JavaScript using backtracking and the MRV heuristic. Learn constraint satisfaction problem techniques with interactive visualization to see the algorithm in action.
1 min read
Read article →Master LeetCode 968: Binary Tree Cameras with a clear bottom-up strategy. Learn the state-based approach, interview-ready code, and step-by-step walkthroughs that ensure you understand both intuition and implementation.
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Read article →Discover how a single character difference in duplicate-skipping logic can silently break your Four Sum solution. Learn why j > 1 fails across different loop iterations and how j > i + 1 ensures all valid quadruplets are found through real debugging examples.
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65
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33
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Years Writing