`a1`，`b1`，`c1` 三个变量在使用时没有初始化为 $0$。
by smart_stupid @ 2024-02-29 16:26:51
@[smart_stupid](/user/928955) 感谢大佬，已AC
by tghr0503 @ 2024-02-29 18:12:42
@[tghr0503](/user/1049497) 哇，真的是你呀
by xiaojie04 @ 2024-02-29 18:25:31