hdu5093

待完善。。。。。。。。。。。。。

http://www.cnblogs.com/baby-mouse/p/4654886.html

http://www.cnblogs.com/fish7/p/4089196.html

http://blog.youkuaiyun.com/u012596172/article/details/40822543

http://blog.youkuaiyun.com/hpuhjh/article/details/47616779

http://blog.youkuaiyun.com/xiaoxiaoluo/article/details/8169533