Comments
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Any way, the description of problem B is really a misleading. However, we can understand the real meaning with the example IO.
0

It is a shame that I have been stuck in A for 1h. Luckly, I skip A and solve B&C in 20 minutes.
On Hudayar → Let's grow!, 4 years ago
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I'm in.

I wish i will become 2100 before 2023.

I will work hard to make it come true
-16

In China, many people will use Li-Chao Segment Tree instead of nomal segment tree. Because it is short and it can solve the problem as well as the nomal segment tree.