[你这非递归怎么比递归还慢](https://www.luogu.com.cn/record/148660651)
by Ac_forever @ 2024-03-23 07:47:33
事实上，STL 的 `std::complex` 比手写更快
[record](https://www.luogu.com.cn/record/152152525)
by lnw143 @ 2024-03-23 08:06:11