push_down有点问题
```cpp
void pushdown_add(ll p){
if(tree[p].lazy_add){
tree[p<<1].maxn += tree[p].lazy_add;
tree[p<<1|1].maxn += tree[p].lazy_add;
tree[p<<1].lazy_add += tree[p].lazy_add;
tree[p<<1|1].lazy_add += tree[p].lazy_add;
tree[p].lazy_add = 0;
}
}
```
by zhuoxingmu @ 2023-10-27 09:22:20
意思是当你 push_down 的时候应该改的是左右子树的信息
by zhuoxingmu @ 2023-10-27 09:24:51
thx
by WhileTrueRP @ 2023-10-27 09:46:00