@[WaterSun](/user/383395) $j$ 就是 $q$，打错了...
by WaterSun @ 2024-04-13 15:47:43
@[WaterSun](/user/383395) $a$ 的长度也是 $n$，数据范围是 $n \leq 8 \times 10^4,a_i \leq 10^5$
by WaterSun @ 2024-04-13 15:54:35
[重写了一下](https://www.luogu.com.cn/paste/anj0utl5)
by WaterSun @ 2024-04-13 16:06:42
样例给一下
by SiuuuCR7 @ 2024-04-13 17:36:01