in:

1
1

true out:

1

wrong out:

0

wrong solution：

https://www.luogu.com.cn/blog/yizhixiaoyun/solution-p5914

https://www.luogu.com.cn/blog/liuxy1234/solution-p5914

https://www.luogu.com.cn/blog/477757/solution-p5914

https://www.luogu.com.cn/blog/zhh20090409/solution-p5914

https://www.luogu.com.cn/blog/542309/solution-p5914

https://www.luogu.com.cn/blog/yihayiha/p5914-poi2004mos-ti-xie

https://www.luogu.com.cn/blog/689650/solution-p5914

以及还未被审的：

https://www.luogu.com.cn/blog/Na2CO3QwQ/ti-xie-p5914-poi2004mos

死因：要特判。