回复：just delete that sentence

来源: jinjing 于 2010-05-09 15:59:48 [] [旧帖] [给我悄悄话] 阅读数 : (393 bytes)
回答: 回复：还有别的方法么？ 由 jinjing 于 2010-05-09 10:09:45

OK.Optimal policy:
1)If you sell y carts ,no $100,you buy all ,get the $100,and close door,OR sell all.
F(y)=[100xy+(100-y)(x*y+100)]/100.
y=(100x-100)/2x,you get Max.
2)If you sell y carts ,no $100,you buy till get $100,and then sell "0" all.OR sell all.
F(y)=[100xy+(100-y)(x*y+100)+(100-y)/2]/100
y=(100x-100)/2x,(Max)though y is the same,but gain is more.
Good luck.

所有跟帖： 

• 回报的期待值是多少？ -guest007- ♀ 给 guest007 发送悄悄话 (0 bytes) () 05/10/2010 postreply 16:27:20

• F(y)=[100xy+(100-y)(x*y+100)+(100-y)/2]/100,y=(100x-100)/2x -jinjing- ♀ 给 jinjing 发送悄悄话 (42 bytes) () 05/10/2010 postreply 17:22:07

• 算我懒 -guest007- ♀ 给 guest007 发送悄悄话 (137 bytes) () 05/10/2010 postreply 17:52:37

• 1)x=2,F(75)=237.5,x=1,F(50)=125,x=.8,F(38)=110.2)x=2,F(75)=248.7 -Jinjing- ♀ 给 Jinjing 发送悄悄话 (111 bytes) () 05/10/2010 postreply 20:36:55

• 谢谢- 还可以更高 -guest007- ♀ 给 guest007 发送悄悄话 (13 bytes) () 05/11/2010 postreply 06:53:37

• You want to peep? -jinjing- ♀ 给 jinjing 发送悄悄话 (0 bytes) () 05/11/2010 postreply 09:54:23

• peep tile win, then start sell -guest007- ♀ 给 guest007 发送悄悄话 (6 bytes) () 05/12/2010 postreply 06:14:27

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