@[3_14](/user/913288) 我认为您可以更好地提问题。您可以参考[提问的智慧](https://www.luogu.com.cn/blog/StudyingFather/how-to-ask-questions-the-smart-way-luogu-edition)。
by NerdFarmer @ 2024-02-20 11:27:53
@[3_14](/user/913288) 初一不影响你会集合的基本概念和基本运算,所以 go to study
by yyrwlj @ 2024-02-20 11:27:56
@[3_14](/user/913288) 不会做可以不做
by IceKylin @ 2024-02-20 11:28:42
包括但不限于说出你对这道题的思路,想法。
by NerdFarmer @ 2024-02-20 11:28:43
@[3_14](/user/913288) 可以参考题解,我也初一,可以用排列组合。
by lczcy1 @ 2024-02-20 11:29:47
再学一下集合
by lczcy1 @ 2024-02-20 11:30:40
看看样例和解释不就懂了
by Spir1t @ 2024-02-20 11:36:50
我也初一我AC了哈哈哈哈哈哈哈哈![](https://cdn.luogu.com.cn/upload/image_hosting/8lsz3oix.png)
by Change_YuAN @ 2024-02-22 20:43:05