AMnu's blog

By AMnu, history, 5 years ago, In English

Actually, this contest ended 2 months ago and you can upsolve here. But, because someone complained me about editorial of this problem yesterday and said that it was hard to understand. And also until I write this blog, just Benq and Pyqe that already submit (and both of them got AC). So, I try to rewrite a clearer explanation about this problem in this link (english version is available on page 8).

Additional :

By the way, I got an idea about this problem more than 3 years ago when I was in junior high school even before I know about cp. Finally, it is published after several years of waiting.

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Thank you so much for this uwu. This was really helpful. I can understand it fully now.