Medium data structure and algorithm practice puzzle.
Given a list of numbers, return the median, rounded to 2 decimals. Sort them. If the count is odd, it's the middle value. If it's even, it's the average of the two middle values. On a live stream, two heaps, one for each half, keep the median cheap to update.
Solve it three ways: snap the jigsaw pieces together, fill in the blanks, or type it from scratch against the tests. This one is free.
Every line of the solution comes with a note explaining why it is there, and a step by step replay shows the code running. At level 3, where you type it yourself, you can ask for an AI mock interview on this problem that ends with a hiring manager's scorecard.
Then grow it into a real project with the Software Engineer button: this puzzle becomes the Document Daily Digest, a pipeline you can run and download. See every Software Engineer project.
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