Long long ago there is a strong tribe living on the earth. They always have wars and eonquer others. One day, there is another tribe become their target. The strong tribe has decide...
The Big Painting
题目连接：
http://acm.hust.edu.cn/vjudge/contest/view.action?cid=122283#problem/J
Description
Samuel W. E. R. Craft is an artist with a growing reputation.
Unfortunately, the paint...
