In this task somebody is telegraphing Olimpiada strange messages with secret password and we need to find that.
We found on Olimpiada's VK.com avatar image her phone number +37255933368 and allusion to the fact that we must use Telegram Messenger. Because of a lot of login requests Telegram started to discard connections. Organizers published message that she "...don't like telegram messenger any more!(( Good old sms rulezzz!"
So we found a service to read sms from public phones and read her messages. We got flag RUCTF_THE_MOST_SECRET_PA$$_3V3R from one of them.