本帖是给别人发的...

附链接：
https://www.luogu.com.cn/record/36780582
https://www.luogu.com.cn/record/36780841
https://www.luogu.com.cn/record/36780986
https://www.luogu.com.cn/record/36781064
https://www.luogu.com.cn/record/36781106
https://www.luogu.com.cn/record/36782285
https://www.luogu.com.cn/record/36782544
https://www.luogu.com.cn/record/list?user=%20197460&pid=P1923&page=1

能用

scanf/printf

的就用吧，

cincout

过慢

/yiw,为什么这两个读入不一样呢？