Permutations II
Return all distinct permutations of a list of integers that may include duplicates.
Subsets II
Given a collection of integers that might contain duplicates, return all possible unique subsets.
Showing 2 challenges · medium · Recursion & Backtracking
Recursion & Backtracking — Python coding challenges
What you will find here
This page lists recursion & backtracking 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.