Coding two pointers
Container With Most Water
LC 11. Why moving the shorter pointer is safe. Speak the proof in one sentence.
Week 1Thursday 15 OctoberTwo pointers
Day 3: Two pointers
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Coding two pointers
Trapping Rain Water
LC 42. Two-pointer vs prefix-max. Walk one valley by hand first.
System design gateway
Reverse proxy vs API gateway
Auth, rate limits, routing, and where TLS dies. Draw the hop list.
Estimation
QPS behind one L7 proxy
Connections, keep-alive, TLS CPU. Bound QPS for one 8-core proxy.