>This investigation identified several suspicious profiles that frequently interacted with Cleo, including those of Vladimir Reshetnikov and Laila Podlesny.

Is the assumption that Vladimir posed as Laila to post the, presumably already solved problems, and then posed as Cleo to 'answer' them quickly? Wiki doesn't come out and make this accusation, but the apparent connection between the 3 accounts makes it seem like that's the case.

cool. reads like a Benjamin Labatut book

As someone who struggles slightly with maths despite working in physics and engineering, I am always in awe of those who can do math so easily. You do occasionally come across those who can do math with minimal intermediate steps and it is mind blowing to watch.