刚学OI就做CTSC%%%
by 若如初见 @ 2019-09-09 17:15:08
@[若如初见](/space/show?uid=139837) quq这不是一道主席树水题吗，可能是我太鶸了Orz
by Nicoppa @ 2019-09-09 17:15:46
~~qndmx~~
by Erusel @ 2019-09-09 17:19:56
啊.. A掉了.. 没看到L的数据范围 quq 我太菜惹xxx
by Nicoppa @ 2019-09-09 17:21:04
Nicoppa!
by wan__yan @ 2019-09-09 17:38:37
群主牛逼
by After__rain @ 2020-04-18 10:43:32
@[Nicoppa](/user/206319) 草，我也。。。/jk
by Leap_Frog @ 2021-02-18 20:40:09