Python Coding Challenges · PythonSkillset

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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

Two Pointers & Sliding Window easy

Longest Substring Without Repeating Characters

Implement a function that returns the length of the longest substring without repeating characters.

strings sliding-window two-pointers

+10 pts 15m

Showing 2 challenges · easy · Two Pointers & Sliding Window

Two Pointers & Sliding Window — Python coding challenges

What you will find here

This page lists two pointers & sliding window 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.