Packets to Pixels, section 1: DNS, ports, NAT, TCP, UDP, HTTP, and email. Includes a networking quiz.
Packets to Pixels, section 2: scaling, caching, CDNs, SQL, indexes, and queues. Includes a system design quiz.
2D arrays, grid traversal, and building toward CCC Question 5 problems.
Heap data structure, priority queues, and practical exercises using Python's heapq module.
Frequency counting, Top-K Frequent Elements, and CCC Bronze Count problem.
Build adjacency lists, detect cycles with DFS, and find valid course orderings.
Master backtracking — subsets, combination sum, and permutations.