This note focuses on my tragic experience.
I got this question because of my learning method: link . I carefully selected the provincial questions and tried to enter the provincial team. So I encountered this problem.
I saw this question and found that there was a tree chain split, so I went to learn, did a lot of questions, and wrote an article link . The tree chain splitting is a good helper to increase the amount of code. Write a tree chain splitting board in the code, and the layman thinks you have the level of national collection.
Then I went back to do it and found that Li Chaoshu didn't learn. So I went to the daily newspaper again, learned Li Chaoshu, and did two questions. I wrote the article link . Unexpectedly, the link I published in Luogu was even higher than the daily likes! 
.
It took me a week to learn about this subject. Finally, I came to the door of this question. I was confident, as if I imagined a list of doors leading to heaven. Unexpectedly, this question really almost sent me to heaven.
It took me two days to write the code for the mentally handicapped, happily \ (0 \) divided. At that time the code had \ (150 \) lines. So I started [OvO] to tune. It took \ (5 \) days before and after \ (AC \) . The details of this question are hemp, the length is attractive, and various precision problems make Konjac have to spend all day [bar cocoa].
During this time I was extremely miserable. I have to sleep before \ (9: 30 \) every day, and school is off early, about \ (OI \) time \ (2 \) hours a day I tuned insanely, right, and read the solution. I suffered all day long and lost, drunk and dreamed, scratched my ears and scratched my cheeks, my eyes were empty.
I think if \ (K \) so and so did not make a question for so many days, it must be crazy. But the experience of \ (Z \) Moumou inspired me, \ (C \) Moumou and another \ (C \) Moumou later guided me, and I finally walked out of the "North Mountain".
Perhaps my thoughts should be more open-minded. Success is not something that can be achieved by death. This experience will inspire me to continue to move forward until the national team. Now, Xiao Xiao is my motivation to move forward. The pressure of meditation also inspired me.
All are temporary impressions, \ (AC \) immediately sorted out, maybe the writing is not good, the ability of Konjac is limited to this.
May there be a moment to say "I will have the throne of the holy mountain, and may the king be a pawn", I wish you all a happy study.