~~bit 它不香么？~~
by mushroom_knight @ 2020-06-06 21:40:49
（虽然我看不懂，但建议楼主拆封装，这样写下去得累死。）
by psoet @ 2020-06-06 21:41:42
@[shygo_cmll02](/user/171487) 看不懂，下一个
by Suuon_Kanderu @ 2020-06-06 21:44:14
（huaji
by Suuon_Kanderu @ 2020-06-06 21:44:22
@[shygo_cmll02](/user/171487)
```cpp
sum = new T[2 * this->n];
=>
sum = new T[1<<(this->m + 1)];
```
by andyli @ 2020-06-06 21:50:03
@andyii 这不对吧。。
by cmll02 @ 2020-06-06 21:52:08
反正我不会
by DP王子 @ 2020-06-06 22:14:22