On March 18 Samara Interacademic Programming Contest was held. It is one of two Collegiate Programming contests, which are organized in Samara every year.

Everyone can take part in this contest as a Codeforces Gym contest. Like any train, this contest uses ACM ICPC rules.

Problem writers are Alexey Dergunov(dalex), Nikita Glashenko (Hohol), Pavel Semushin (craus) and Andrey Gaidel (Shlakoblock). Testers are Natalia Bondarenko (natalia) and me (I_love_natalia).

Contest will be most interesting for participants with color from green to orange (Difficulty is 3 stars). Red participant most probably will spend much less time than 5 hours for solving all problems (both of testers finished it in about 3 hours).

Train will be held on Saturday at 16:00 MSK. Everyone is welcome to participate.

Please, do not use any prewritten code and any internet materials in token of respect to ghost participants who will compete with you ;)

Upd. Time was changed to 16:00 (MSK, UTC+4).

Upd2. Don't forget to use input.txt and output.txt files instead of stdin/stdout.

Upd3. Do not use the %lld specifier to read or write 64-bit integers in С++. It is preferred to use the cin, cout streams or the %I64d specifier.

I'm being inspired by this old post by ralekseenkov.
I think we should do something like that.