Solution: Basic Calculator
Understand how to solve arithmetic expression evaluation by implementing a basic calculator using stacks. Learn to parse digits, handle + and - operators, and manage nested parentheses effectively. This lesson guides you through a step-by-step approach to build a stack-based solution optimizing time and space complexity.
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:
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s.length