The Postfix Processor

A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

medium

Seniority

L4

Problem

Given a list of string tokens forming a valid postfix (RPN) expression supporting integers and operators '+', '-', '*', '/', evaluate it. Use integer-truncation-toward-zero division for '/'. Return the integer result.

Summary

Math without parentheses - the operators come after the numbers.

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