Evaluate Reverse Polish Notation

Explore how to evaluate arithmetic expressions in Reverse Polish Notation (RPN). Understand the use of operators and operands in RPN expressions, implement a solution that handles integer calculations, and efficiently compute results using a stack-based approach with optimal time and space complexity.

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Statement

Given an arithmetic expression in a Reverse Polish Notation (RPN)Reverse Polish Notation is a mathematical notation in which every operator follows all of its operands. as an array of strings, tokens, your task is to evaluate and return the value of the given expression.

Points to consider:

Valid operators are +, -, *, and /.
Each operand can be an integer or another expression.
The division between two integers should truncate toward zero.

The given Reverse Polish Notation expression is guaranteed to be valid. This ensures that the expression ...