摘要：
FatMouse has stored some cheese in a city. The city can be considered as a square grid of dimension n: each grid location is labelled (p,q) where 0 <= 阅读全文
摘要：
这是一个简单的生存游戏，你控制一个机器人从一个棋盘的起始点(1,1)走到棋盘的终点(n,m)。游戏的规则描述如下： 1.机器人一开始在棋盘的起始点并有起始点所标有的能量。 2.机器人只能向右或者向下走，并且每走一步消耗一单位能量。 3.机器人不能在原地停留。 4.当机器人选择了一条可行路径后，当他走 阅读全文
摘要：
A number whose only prime factors are 2,3,5 or 7 is called a humble number. The sequence 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24 阅读全文
摘要：
Ignatius has just come back school from the 30th ACM/ICPC. Now he has a lot of homework to do. Every teacher gives him a deadline of handing in the ho 阅读全文