Easy data structure and algorithm practice puzzle.
A status board logs one HTTP code per minute. Any code of 500 or above is an outage, and everything else is healthy. Given the log, return the longest run of healthy minutes in a row. Don't forget a healthy run that lasts all the way to the end of the log.
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 Reading Streak Finder, a pipeline you can run and download. See every Software Engineer project.
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