All-Pairs Shortest-Paths (Floyd-Warshall Algorithm)
Floyd–Warshall all-pairs shortest paths: DP recurrence, intuition, and Python example
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Single-Source Shortest-Paths (Dijkstra Algorithm)
Dijkstra’s algorithm: relaxation, invariants, and priority-queue runtime tradeoffs
Performance of the Java Collections Framework
A compact Big-O cheat sheet for core Java Collections Framework operations
Huffman Encoding
Huffman coding: prefix-free codes, greedy merging, and heap-based runtime analysis
Fractional knapsack
Fractional knapsack: value-density greedy strategy and why it differs from 0-1 knapsack
DP vs. Greedy (the activity-selection problem)
DP vs greedy through activity selection: optimal substructure, greedy choice, pseudocode