Salam sejahtera, Codeforces!

We are excited to invite you to the mirror of Indonesia National Contest (INC) 2026!

The Indonesia National Contest (INC) is an annual online programming competition that serves as a preliminary and qualifying round for Indonesian teams to advance to the ICPC Asia Jakarta Regional Contest.

Key details:

• Rated for all

• Contest links: TLX

• Time: Sunday, October 25, 2026 at 13:05 UTC

• Duration: 2 hours

• Problems: 6

• Allowed languages: C, C++11, C++17, C++20, Pascal, Java, Python 3, Go, Rust

• Contest style: ICPC

  • Penalty per wrong submission: 10 minutes
  • There will be no scoreboard freeze.

• Available Languages: English, Bahasa Indonesia

• The list of problem authors, testers, and committee members will be revealed after INC 2026 is finished.

We would like to thank:

• Our mysterious testers for testing the problems and giving outstanding feedback.
• Our as-yet-unknown scientific and technical committee of INC 2026.
• fushar for the majestic TLX platform.
• You for participating!

Please register for the contest! We encourage you to read all problems. Enjoy the mirror!