Hi, I cannot find any block-cut tree materials. I would be grateful if anyone gives me some.

Hi, I am taking a CP test next month. Although I have trained for a long time, I don't think I have any improvements. If you have a month before a CP examination, what will you do to prepare? What do you focus intensively on? What do you think you can do to have the best result(with your ability) in the contest?

I've been stuck at Expert/CM for almost two years now. Most advice online just says to grind more problems, but that doesn't really work for me. Does anyone have more effective advice?

This code is from: https://mirror.codeforces.com/blog/entry/86731 ~~~~~ struct Line { data_t a, b;

Line() : a(0), b(-inf) {} Line(data_t a, data_t b) : a(a), b(b) {}

data_t get(data_t x) { return a * x + b; } }; ~~~~~

I have no idea what the colon marks in the code means?