Hello everyone,

hihoCoder is going to hold a contest at the first day of this year. (2017/01/01 19:00 UTC+8)

hihoCoder is a Chinese website which holds some contests for beginners and also a monthly challenge.

The contest lasts 2 hours and contains 4 problems. The problem set is prepared by me and jiry_2. There will be english translation of the problems. The hardest problem is as hard as div1 C/D in my mind.

Enjoy problems!