ltaravilse, he was that kind, funny and super helpful guy. I'm sure many of us interacted with him some how, and I was lucky to meet him in person more than once. Everyone from the old TopCoder days should remember him.
Sadly, and I still can't believe it, he passed away yesterday. This is a really sad event for the whole competitive programming community. People from South America can tell more about how kind and helpful he was.
MikeMirzayanov, can we please have a round in his name?
Rest in peace my dear Leo.