Evaluate Reverse Polish Notation

Understand how to evaluate arithmetic expressions written in Reverse Polish Notation using valid operators and operands. Learn to implement an efficient solution that operates in linear time and space, ensuring accurate calculation even with truncation toward zero. This lesson helps enhance problem-solving skills for coding interviews by mastering this common evaluation pattern.

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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 ...