Easy data structure and algorithm practice puzzle.
Given the day of an incident and the number of days allowed to file, return the last day a claim is still valid. Add the limit to the incident day. The real question in law is whether the count includes both the first and last day. Off by one here is the difference between a filed claim and a thrown-out one.
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 Clause Range Service, a pipeline you can run and download. See every Software Engineer project.
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