hacker
```
ABC
ABCD
```
根本原因：A和B可能长度不等
by __std_failure @ 2019-08-19 16:09:11
也就是说,sum1和sum2要分开算
by __std_failure @ 2019-08-19 16:09:38
@[tiger2005123](/space/show?uid=140439) 对呀我傻了...
by zrf1170375918 @ 2019-08-20 10:24:00
@[tiger2005123](/space/show?uid=140439) 谢谢
by zrf1170375918 @ 2019-08-20 10:24:19