qppppp
by cmll02 @ 2021-01-23 18:49:51
qp + Div.2 B 数据真的水（
我强行把 $n$ 改成了 $1300$（
by CGDGAD @ 2021-01-23 18:50:59
@[pocafup](/user/219099) 洛谷非出题人不能看到20页以前的提交，都会显示为20页，你让出题人核实吧
by SSerxhs @ 2021-01-23 18:52:12
qp
by Karry5307 @ 2021-01-23 18:54:59
qp
by ducati @ 2021-01-23 19:12:25
qp
by yuchenren @ 2021-01-23 19:16:41
qp
by zhuangjin @ 2021-01-23 19:24:53
qp
by Utilokasteinn @ 2021-01-23 19:30:09
qp
by BFSDFS123 @ 2021-01-23 19:39:15
qp
by BotDand @ 2021-01-23 20:04:36