I attempted a brute force function at first which had the timeout issues, then I figured out the algo by thinking about squares and triangles to come up with a quicker solution...however, at larger integers, python's math completely fails. I've double checked the math on a calculator and it should be returning a different result, but for whatever reason python is returning the wrong number. Not sure how to proceed with this one.

Lol that's cheating

There's always one goofball XD love it

or genius?

Do I need to do anything to fix this? Or has it been taken care of? Or do I need to repost but ensure the spoiler is in place?