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Grokking the Coding Interview Patterns in Go

Solution: Basic Calculator

Explore how to build a basic calculator that evaluates arithmetic expressions containing integers, plus and minus operators, and nested parentheses. Learn to apply stack data structures to manage intermediate results and efficiently handle nested subexpressions in Go.

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Statement

Given a string containing an arithmetic expression, implement a basic calculator that evaluates the expression string. The expression string can contain integer numeric values and should be able to handle the “+” and “-” operators, as well as “()” parentheses.

Constraints:

Let s be the expression string. We can assume the following constraints:

  • 1≤1 \leq s.length ≤3×103\leq 3 \times 10^{3}
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