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Python Coding
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925 challenges 556 easy 323 medium 46 hard

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Lists & Arrays hard

Sliding window maximum

Return the maximum of each window of size k as it slides across an array.

sliding-window deque arrays

Lists & Arrays easy

Running Total Window

Implement a function that returns a list of running totals, resetting to zero after each positive sum.

running-total sliding-window arrays

Lists & Arrays easy

Rolling Window Mean

Given a list of numbers and a window size k, return a list of the means of every contiguous subarray of length k.

sliding-window lists averaging

Lists & Arrays medium

Convolve 1D Signal

Write a function that computes the 1D convolution of two lists in 'full' mode.

convolution arrays sliding-window

Showing 1–4 of 4 challenges · Lists & Arrays

Lists & Arrays — Python coding challenges

What you will find here

This page lists lists & arrays 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.