没读入abcd四个变量
by frelow_poem @ 2023-03-19 14:03:26
@[Chettoartist](/user/508577) 没有输入。
by mt_1217 @ 2023-03-19 14:05:49
加上 `cin>>a>>b>>c>>d;` 就 AC 了。
by mt_1217 @ 2023-03-19 14:06:53
哦对，我傻BIIIIIII
by Chettoartist @ 2023-03-19 14:11:04