[rightbyte]

Ye I meant running it and then correcting the error.

Concerning binary search I acctually implemented that in an ECU for message sorting. It took like a whole day, including getting the outer boundries one off too big in the first test run. Funnely enough the vehicle ran fine anyway.

I would never pull that algorithm off correctly in an interview without training to, I think.

[kragen]

Take a look at the downvoted-to-0 formulation I gave upthread, then see if you can program it that way tomorrow without looking, and then think it through to see if it could possibly be wrong, and once you're satisfied it's correct, try testing it. Probably you'll never need to implement binary search yourself again, but it's a good exercise for thinking through algorithms. You can probably get it working that way in under an hour instead of a whole day.