您的最优解是当鸭子到岸与狐狸距离为最大。让我们加加油。

所有跟帖： 

• how about 'what is the min speed of the duck'? -guest007- ♀ (0 bytes) () 05/10/2010 postreply 17:41:45

• It seems not related to the speed , but the distance. -皆兄弟也- ♂ (47 bytes) () 05/11/2010 postreply 10:36:36

• you are right in math,but the poor duck has to swim a lot of cir -jinjing- ♀ (44 bytes) () 05/10/2010 postreply 17:57:12

• No "a lot of cir" -guest007- ♀ (146 bytes) () 05/11/2010 postreply 06:56:59