@[Dai_Fu](/user/704655) orz线段树大神
by ljohvye @ 2023-10-12 18:39:00
```cpp
if(x<=mid) jf(id<<1,x,y,zax);
else jf(id<<1|1,x,y,zax);
```
不知道其他地方,但是这里肯定是不对的。
@[yutong_Seafloor](/user/773747)
by Wind_Leaves_ShaDow @ 2023-10-12 18:44:40
三个函数这里都有问题。
改成这个?
```cpp
if(x<=mid) jf(id<<1,x,y,zax);
if(y>mid) jf(id<<1|1,x,y,zax);
```
by Wind_Leaves_ShaDow @ 2023-10-12 18:46:20
pushup那写错了
by xuhaotian @ 2023-10-12 18:49:49
@[zsq20100122](/user/807774) 脑子抽了,~~觉得if后边跟else省力气~~,然而爆零还是没得跑(逃)
by yutong_Seafloor @ 2023-10-12 18:50:20
```cpp
void modd(int id){
tr[id].sum=(tr[id<<1].sum+tr[id<<1|1].sum)%mod;
return ;
}
```
*改为+
by xuhaotian @ 2023-10-12 18:50:24
《最典的来了》
```cpp
void modd(int id)
{
tr[id].sum=(tr[id<<1].sum*tr[id<<1|1].sum)%mod;
return ;
}
```
[实测改完后能 AC](https://www.luogu.com.cn/record/128946170)
by Wind_Leaves_ShaDow @ 2023-10-12 18:51:37
我甚至没有往你题目看错那边想 qwq
by Wind_Leaves_ShaDow @ 2023-10-12 18:52:28
@[xuhaotian](/user/576448) 维护吗?查了一遍没查出问题,求确切指点
by yutong_Seafloor @ 2023-10-12 18:53:21
《区间求和》
你写的区间求积。qwq
@[yutong_Seafloor](/user/773747)
by Wind_Leaves_ShaDow @ 2023-10-12 18:54:04