@[寒鸽儿](/user/88735)
~~鸽巨怎么这么晚还没睡~~
您 `BIT::add` 函数中多写了一个 `c[ x ] += v;`，删除后即可 AC
by meyi @ 2021-09-12 04:28:03
orz zankizero
by 寒鸽儿 @ 2021-09-12 05:00:16
鸽巨怎么又在熬夜卷题。
by Macesuted @ 2021-09-12 06:56:31
/se/se/se 鸽巨有tag了 /se/se/se
by 引领天下 @ 2021-09-12 07:10:59
orz 大佬们熬夜卷题：）
by NickSymmonds @ 2021-09-12 07:24:37
/se/se/se 鸽巨有tag了 /se/se/se
by Yukinoshita_Yukino @ 2021-09-12 07:42:45
orz 大佬们熬夜肝题
by luo_shen @ 2021-09-12 07:57:30
orz 大佬们熬夜卷题：）
by hanyuchen2019 @ 2021-09-12 08:26:09
/se/se/se 鸽巨有tag了 /se/se/se
by qinyihao @ 2021-09-12 08:42:02