Optimize file reading and expression DFS

Q: Optimize file reading and expression DFS

This question evaluates proficiency in memory-efficient file I/O and streaming data access alongside parsing and evaluating mathematical expressions using depth-first search, testing parsing algorithms, recursion/stack reasoning, and space-time trade-offs.

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Given a large password file, build a program to read the required password(s) while minimizing memory usage. How would you optimize the space so that only the needed content is loaded? Given a mathematical expression as a string, write code to evaluate it using a depth-first-search (DFS) approach.

Optimize file reading and expression DFS

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