The best chance is #3 because all he needs is take #1 + #2 divide by 2. e.g. #1+#2=28 then he take 14. This is the best chance to avoid being highest or lowest and worst case scenario is he equals #1 & #2. However because all 5 knows this simple theory so I think they all died because they all ended up picking the same number of beans.公仔箱論壇$ D M! ~8 b2 v& E# \0 F: A
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Starting from #1, he knows he cannot pick anything bigger then 49 because if he did, then #2 only have to leave 3 beans for #3 #4 & #5 then he'll live. e.g. #1 picked 53 then #2 picks 100-53-3=44. then A,C,D,E all died. e.g. #1=53, #2=(100-53-3)=44, #3=1, #4=1, #5=1. The best chance for #1 is to pick anything less then or equal the median 20 (100 divided by 5). In fact anything between 3-20 won't change the result. Let's say #1 pick 20. 4 v0 R; Z& @8 _: }
. r+ H8 a) [# E+ k% B% \2 p4 J公仔箱論壇Now #2 knows whatever he picks, #3 will take the median between him & #1 e.g. now #1 picked 20, if he pick 6 then #3 will pick 13 putting him either being the lowest or highest. He cannot allow that so the best chance is to match #1, so he picked 20 as well.公仔箱論壇; z: D; ^% g0 I: n) q% i
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#3 did the obvious choice 40 divided by 2 =20, so he picked 20
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. {1 |7 M9 d7 }+ z1 O2 t5.39.217.77:8898#4 base on knowing the median rule take 60 divided by 3 =20, so he picked 20 as well.
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, J% f( m# d% Q5 k: P7 G5.39.217.77:8898#5 same as above, he takes 80 divided by 4 =20, picked 20 as well.
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Ended all have the same number and all died. |
發表於 2006-12-9 12:41 AM
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