取模取少了：
153-155行
```
if (l <= m) ans += query(l, r, ls(now), cl, m);
if (m < r) ans += query(l, r, rs(now), m + 1, cr);
return ans;
```
168行:
```
ans += query(V[x].rank, V[y].rank);
```
把取模加上就能过了
by __Chx__ @ 2023-11-05 21:56:42
@[InoriILU](/user/768692)
by __Chx__ @ 2023-11-05 21:57:05
@[__Chx__](/user/753355) 谢谢大哥qwq
by InoriILU @ 2023-11-06 14:38:12