@[HuYangMu2011](/user/632311)
by miffy_123 @ 2024-03-13 21:05:56
```cpp
if(l<=t[p].l&&r>=t[p].r){
t[p].sum+=(t[p].r-t[p].l+1)*t[p].lazy_tag;
t[p].lazy_tag+=v;
return;
}
```
改为
```cpp
t[p].sum+=(t[p].r-t[p].l+1)*v;
```
by long_ting @ 2024-03-14 09:42:36
@[long_ting](/user/1134329)
by long_ting @ 2024-03-14 09:42:44
@[miffy_123](/user/705296)
by long_ting @ 2024-03-14 09:42:54
蟹蟹大佬，已关
by miffy_123 @ 2024-03-14 21:19:00