2020.11.23

\(\mathcal{A}\)

\(\begin{aligned}(2^n-1)^{2^n}\end{aligned}\)和\(\begin{aligned}(2^{n-1}-1)^{2^n}\end{aligned}\)结尾\(2n-1\)相同

\(\mathcal{B}\)

感觉今年的cspt3的做法和懒人标记有点像。只有要用了再下下传。