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DIY: Basic Calculator III

Understand how to implement a function that evaluates mathematical expressions containing integers, addition, subtraction, multiplication, division, and parentheses. This lesson helps you practice Rust coding skills by solving a real-world inspired problem, preparing you for coding interviews involving expression parsing and calculation.

Problem statement

You are given a string s containing only positive integers, operators ('+', '-', '*', '/'), and parentheses '()'. The intermediate results of the given expression string are in the range [-2312^{31} ...