Hi everyone!

During this exciting ACM season, our country had organized an online training contest. And now we have decided to make it public via Codeforces gym!

The contest is scheduled on Sunday, Oct 12th at lasts for 5 hours 15 minutes.

The contest was designed to be easy, most suitable for div 2 and purple teams. But if reds rated want to join, you are more than welcome: We believe there should be at least 1 interesting problem for you.

The problem setters are ConanKudo, ngfam_kongu, khuebeo and me (I_love_Hoang_Yen). After happy ending at ACM World finals, we have retired from ACM careers and now set contests in our free time. Though, this is my first time adding a contest to Codeforces.

Good luck & have fun!

UPD. The contest will start in less than 24 hours. There will be problem statement in English and Vietnamese. However, due to technical reasons, Vietnamese problem statement could not be uploaded directly to Codeforces. During the first 5 minutes of the contest, we will give link to Vietnamese version in an Announcement.

UPD 2. 1 minute to contest. Good luck and have fun!

UPD 3. Contest is over. Congrats to ThanQ+ team who solved 8 problems. The problem set turned out to be much harder than I predicted. You can find solution here