@[tzq2008wd](/user/177864) 很明显的二分,线段树似乎做不了
by Utilokasteinn @ 2021-09-29 09:59:39
如果对线段树有兴趣,刚入门的话可以看看这个吧(自己做的,不喜勿喷 https://www.luogu.com.cn/training/69231
by Utilokasteinn @ 2021-09-29 10:00:58
@[еcho](/user/306049) ~~这标签误人子弟~~
by wdy1028 @ 2021-09-29 10:16:42
@[еcho](/user/306049) 感谢回复
by tang01 @ 2021-09-29 16:05:38