我算了，是O(4n)=O(n)
by gaolangwen_is_sb @ 2022-08-27 19:19:22
你有提交这题？
by irris @ 2022-08-27 19:24:38
@[AlgorithmerSnow](/user/419487) 应该是小号发帖
by liangbowen @ 2022-08-27 19:26:21
@[liangbowen](/user/367488) 看到了。
by irris @ 2022-08-27 19:26:41
@[li_bai_Delete](/user/757946) 加个
```cpp
ios::sync_with_stdio(false);
cin.tie(0), cout.tie(0);
```
by liangbowen @ 2022-08-27 19:27:23
@[li_bai_Delete](/user/757946) 开个O2就过了
by bamboo12345 @ 2022-08-27 19:27:52
@[AlgorithmerSnow](/user/419487)
是我朋友@[gzt121117](/user/616996) 想发的 但是他被@[2012zxt](/user/537218) JC 了，我代替他
by gaolangwen_is_sb @ 2022-08-27 19:36:28