hack：

1
1 0

Yes

可以叉掉的题解：

• https://www.luogu.com.cn/article/kmggxwiv

• https://www.luogu.com.cn/article/9vt02dd3

• https://www.luogu.com.cn/article/qh9qq85h

• https://www.luogu.com.cn/article/udcnomvq

• https://www.luogu.com.cn/article/qcfdiesj

• https://www.luogu.com.cn/article/n4bsgvht

• https://www.luogu.com.cn/article/fyyviryx

• https://www.luogu.com.cn/article/cdqcge6n

• https://www.luogu.com.cn/article/25k58lwc

• https://www.luogu.com.cn/article/iysqchtd

• https://www.luogu.com.cn/article/zcc4yp6e

• https://www.luogu.com.cn/article/dx6dwoir