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Python Coding
Challenges

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819 challenges 506 easy 280 medium 33 hard

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Stacks & Queues medium

Evaluate Reverse Polish Notation

Evaluate an arithmetic expression written in reverse Polish notation using a stack.

stacks arithmetic parsing

Stacks & Queues medium

Daily Temperatures

Given a list of daily temperatures, return for each day how many days until a warmer temperature appears.

stacks arrays monotonic-stack

Stacks & Queues medium

Decode String Stack

Decode a compressed string with repeated substrings like '3[a2[c]]' to 'accaccacc' using a stack-based approach.

stacks string parsing

Showing 3 challenges · medium · Stacks & Queues

Stacks & Queues — Python coding challenges

What you will find here

This page lists stacks & queues challenges — real Python problems you solve in the browser IDE with instant test feedback. Each challenge includes a clear brief, starter code, and automated checks.

Challenges vs tutorials and quizzes

Challenges test what you can build under constraints. For guided teaching, use our Python tutorials. For quick checks, try quizzes or copy snippets from code samples.