主函数
```cpp
for(int i=1;i<=n;i++){
int v;
scanf("%d",&v);
modify(1,i,v);
}
```
```modify dfn[i]```,改完过样例了,但是 50
by UYHW @ 2022-12-03 20:49:41
@[huajiguai111](/user/252567) 你dfn还没算呢。。。
by ACaCaca_ @ 2022-12-03 20:54:41
@[CaCa_Condy](/user/320423) 当然不是直接改。。
by UYHW @ 2022-12-03 20:55:08
@[Habers](/user/345900) 改完之后 ```#define int long long``` 就过了
by UYHW @ 2022-12-03 20:57:19
@[huajiguai111](/user/252567) 那确实得改
by ACaCaca_ @ 2022-12-03 21:25:25
@[huajiguai111](/user/252567) @[CaCa_Condy](/user/320423) 关注到账了。
by Haber @ 2022-12-03 21:56:39