Google把ChromeBook当Fashion卖了# PDA - 掌中宝
n*r
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1.一个0/1序列,长度为N(say N=1000)0/1出现的概率均为1/2 求出现的最长
continuous序列的expected长度(连续的0或连续的1均可,只要最长)。now
repeat it for any 02.49 辆赛车. Assume for each one, it travels the track in the same
amount of time every time. Also assume no two finish the track in the
same amount of time. Suppose you have 7 tracks, but no timer. Design
races to find the 25-th fastest with minimal number of races.
continuous序列的expected长度(连续的0或连续的1均可,只要最长)。now
repeat it for any 02.49 辆赛车. Assume for each one, it travels the track in the same
amount of time every time. Also assume no two finish the track in the
same amount of time. Suppose you have 7 tracks, but no timer. Design
races to find the 25-th fastest with minimal number of races.