Day 5: Strings

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Week 1 Context

4 remaining

Coding hash map

LC 49. Count-key vs sort-key. Complexity of each, then code the faster one.

Study

Coding two pointers

LC 125 and 5. Expand-around-center. State why DP is optional here.

Study

System design request path

Client → DNS → LB → gateway → service. Name caches at each hop.

Study

Estimation

Ingress bandwidth, TLS CPU, and how many 25Gbps NICs you need.

Study