@[一SakuRa](/user/419519) once修改函数有锅，不应该递归到最底层
by dingxingdi @ 2021-09-20 14:59:30
once复杂度不对
by Raymondzll @ 2021-09-20 15:01:29
@[一SakuRa](/user/419519)
```
inline void once(int C,int L,int R,int l,int r,int rt){
if(l<R||r>L)return;
if(l>=L&&r<=R){
sum[rt]+=C*(r-l+1);
add[rt]+=C;
return ;
}
int mid=(l+r)>>1;
PushDown(mid-l+1,r-mid,rt);
once(C,L,R,l,mid,rt<<1);
once(C,L,R,mid+1,r,rt<<1|1);
PushUp(rt);
return ;
}
```
by Raymondzll @ 2021-09-20 15:04:39
@[Raymondzll](/user/225192)
谢谢谢谢
by 一SakuRa @ 2021-09-20 15:04:56
@[Raymondzll](/user/225192)
谢谢谢谢
by 一SakuRa @ 2021-09-20 15:05:14