不对啊,4和5是仇敌啊。。
by 2016jzy @ 2016-11-15 22:35:29
选1、5、7不行吗?
by asuldb @ 2017-01-19 21:24:04
对,样例的输出也可以是
```
3
0 0 0 1 0 1 1
```
by 966123anyunchuan @ 2020-09-10 23:23:18