Problem Statement

You may download the problem set from the following link.

You may find problem description.

http://icpc2021.ntub.edu.tw/wp-content/uploads/2026/09/main-1.pdf

http://icpc2021.ntub.edu.tw/wp-content/uploads/2026/09/main-with-hint.pdf

https://codeforces.com/gym/103443