Medium data structure and algorithm practice puzzle.
Given box types as [count, unitsPerBox] and how many boxes the truck holds, return the most units you can load. Sort the types by units per box, highest first. Take as many of the best type as fit, then move to the next. Every box takes one spot no matter what, so the fullest box is always the right pick.
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 Step Budget Allocator, a pipeline you can run and download. See every Software Engineer project.
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