```cpp
node a[50000001];
long long f[50000001];
```
您这不MLE反而奇怪了。。
by dxy2020 @ 2021-10-16 21:30:22
@[小小蒟蒻一只](/user/366254) 现在变成WA求救了...
by Doctor_zhc @ 2021-10-16 21:33:29
@[Doctor_zhc](/user/498049)
```cpp
printf("%lld",ans);
```
如果还不对当我没说
by dxy2020 @ 2021-10-16 21:34:46
@[小小蒟蒻一只](/user/366254) 当我没说，AC了，多谢
by Doctor_zhc @ 2021-10-16 21:49:19