Python coding challenges: "profit"

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Greedy Algorithms easy

Stock Buy Sell Once

Given daily stock prices, compute the maximum profit you can achieve from buying once and selling once later.

array profit max

+10 pts 15m

Two Pointers & Sliding Window easy

Best Time to Buy and Sell Stock

Given a list of daily stock prices, determine the maximum profit achievable by buying on one day and selling on a later day.

arrays sliding-window profit

+10 pts 15m

Showing 2 challenges · easy

Guide: free Python coding challenges

Practice Python by solving problems

PythonSkillset challenges are hands-on coding exercises from beginner to advanced. Open a challenge, read the problem, write Python in the split-pane editor, and run tests with Pyodide — no install required.

How to use the arena

Pick a category — basics, algorithms, strings, and more
Open a challenge, read the statement, and edit the starter code
Run tests, fix failures, then try a related quiz or tutorial lesson

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.

Python Coding Challenges