[P4891 序列]{https://www.luogu.org/problemnew/show/P4891}
毒瘤线段树
区间维护:
\(pa:a<b的b积\)
\(pb:a>=b的a积\)
\(max_a:最大a\)
\(min_b:a<b中最小b\)
\(cnt:a<b的个数\)
\(lazy:标记下传\)
[P4891 序列]{https://www.luogu.org/problemnew/show/P4891}
毒瘤线段树
区间维护:
\(pa:a<b的b积\)
\(pb:a>=b的a积\)
\(max_a:最大a\)
\(min_b:a<b中最小b\)
\(cnt:a<b的个数\)
\(lazy:标记下传\)