永夜莫明的博客

On the stage of an auditorium program there are three closed doors: door 1, door 2 and door 3. Behind one of these doors there is a car and behind the other two doors there is a goat. The production o...

唐纳德先生与 .DOC题目链接：https://acm.ecnu.edu.cn/contest/126/problem/D/单测试点时限: 6.0 秒内存限制: 1024 MB去年夏天的时候，唐纳德先生就注意到学校饮水机上挂了一个新的牌子：天热冷水需求量大。当时他还不以为意，这不过是一个普通的牌子。于是，天冷了。有一天他注意到牌子上面新增了一个交换的记号。原来，现在牌子要改成「天冷...

Fish likes to take photo with his friends. Several days ago, he found that some pictures of him were damaged. The trouble is that there are some seams across the pictures. So he tried to repair these ...