我猜一下啊，所有
```cpp
tree[p].lazy_star=(tree[p].lazy_star*k)%mod;
```
要改成
```cpp
tree[p].lazy_star=(tree[p].lazy_star+k)%mod;
tree[p].lazy_add=(tree[p].lazy_add*k)%mod;
```
by cosf @ 2024-03-28 18:01:22
@[cosf](/user/516725) az,感谢,已关
by wangziwenhk @ 2024-03-31 08:36:32
此贴结
by wangziwenhk @ 2024-03-31 08:36:50