现有的题面很难理解
by 谋事在人 @ 2020-03-30 14:41:25
$4\leq h,w\leq 30$
~~~
$4\leq h,w\leq 30$
~~~
by Aw顿顿 @ 2020-03-30 14:42:39
@[StudyingFather](/user/22030)
by 谋事在人 @ 2020-03-30 14:42:47
@[cyjian](/user/20782)
by xhQYm @ 2020-03-30 14:56:05
@[谋事在人](/user/105006) fixed & thanks
by CYJian @ 2020-03-30 16:09:58