Jin's answer is good enough

Answer in three lines with recursive functions is preferred and sufficient.

Direct functions are pure math and labor intense to me. I am bad at math.

My initiative is more related to the way of thinking –

“if A and B are both smart, B can just sit back and ‘give up/waive’ ALL HIS RIGHTS!” Understand this sentence is the same important as getting the answer.

“如果A B和阁下一样聪明，B 从头到尾无需动用其优先权。 “

所有跟帖： 

• 回复：Jin's answer is good enough -jinjing- ♀ (7 bytes) () 07/15/2010 postreply 19:41:39

• 回复：Jin's answer is good enough -一川烟雨- ♀ (73 bytes) () 07/16/2010 postreply 14:57:24

• 之后。A先切，然后B决定是否使用优先权。使用，则拿大块，但失去一次优先权。 -皆兄弟也- ♂ (0 bytes) () 07/16/2010 postreply 19:50:22