@[5k_sync_closer](/user/388651)
by sto_5k_orz @ 2024-02-21 20:24:54
@[sto_5k_orz](/user/675466) 看上去你没写 `pushdown`，(没有细看
by Saka_Noa @ 2024-02-21 20:30:18
@[Saka_Noa](/user/498612)
```cpp
void pushdown() {
swap(ch[0], ch[1]);
if(ch[0] != nullptr) ch[0] -> rev ^= 1;
if(ch[1] != nullptr) ch[1] -> rev ^= 1;
rev = 0;
}
```
by sto_5k_orz @ 2024-02-22 08:39:01
@[Saka_Noa](/user/498612) 应该是 split 锅了
by sto_5k_orz @ 2024-02-22 08:39:32
@[luogu_gza](/user/301255)
by sto_5k_orz @ 2024-02-22 09:18:24
@[5k_sync_closer](/user/388651)
by sto_5k_orz @ 2024-02-22 09:25:32
@[TheShuMo](/user/304558)
@[Scene](/user/574338)
by sto_5k_orz @ 2024-02-22 09:26:08
过了。
```cpp
void upd_siz() {
siz = cnt;
if(ch[0] != nullptr) siz += ch[0] -> siz;
if(ch[0] != nullptr) siz += ch[1] -> siz;
}
```
by sto_5k_orz @ 2024-02-22 09:51:21