说明：  狼找兔子问题：一座山周围有n个洞，狼从0号洞开始，每经过m个洞时，就进洞找兔子，输入m，n，问兔子有没有幸存的机会，如果有，藏哪？
(Wolf find rabbit problem: n holes around a mountain wolf from 0 hole every m a hole, the hole looking for rabbits, input m, n, and asked the rabbit has no chance of surviving, and if so, Tibet Which?)