Dear Codeforces community,

We're excited to invite you to TOKI Regular Open Contest (TROC) #12!

Key details:

• Rated
• Contest links: Div 1 and Div 2
• Time: 2 May 2020, 21:05 UTC+7
• Style: full feedback, with penalty (time taken to reach current score) + (4-minute penalty per wrong submission)
• Scoring: You get the score assigned to the problem when you fully solve it
• Writers: Berted Pyqe yz_ Pa.Nic steven.novaryo rama_pang vioalbert
• Duration: 2 hours
• Problems: 5 for every division
• Allowed languages: C, C++11, Pascal, Java, Python 3

The round uses two divisions system:

• Users with rating less than 2000 or not yet rated should participate in Div 2
• Users with rating at least 2000 should participate in Div 1

Scoring distribution:

• Div 2: 100 — 200 — 350 — 400 — 500
• Div 1: 100 — 200 — 300 — 400 — 400

Please register to the contest, and we hope you will enjoy TROC #12!

UPD1: Contest is over! Our top 5:

Div 1:

1. Benq
2. antontrygubO_o
3. malfple
4. jonathanirvings
5. buko

Div 2:

1. nuip
2. MrBrionix
3. kzvd4729
4. hitonanode
5. Littleboy123

Editorial is available here (English on page 10).

You can upsolve the problems here.

We would like to thank hocky, fushar as organizers, and also ayaze, halohalo as testers, and Yoshiyuki as proofreader.

Thank you for participating and see you on the next contest!