题目链接https://nanti.jisuanke.com/t/31462题目After the long vacation, the maze designer master has to do his job. A tour company gives him a map which is a rectangle. The map consists of $N \times M$ li...
题目链接http://acm.hdu.edu.cn/showproblem.php?pid=6393题目Problem DescriptionChika is elected mayor of Numazu. She needs to manage the traffic in this city. To manage the traffic is too hard for her. So ...