In mathematics you don't understand things, you just get used to them.

A bzoj - 3260 跳。简单且狗儿题,最多算根号次,不取模差不多得了。//how to get this one???? #include<bits/stdc++.h> co...

对于 Newton Expansion,式子本身的证明其实无甚可翻新的花样,但是题还是很有意思的。比如 codeforces - 1332E Height All the Same 这个。首先给...