见证强大的“人工智能”:iPhone 4S语音助理初体验 (转载)# PDA - 掌中宝
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Each user ranks N songs in order of preference. Given a preference list, fin
d the user with the closest preferences. Measure "closest" according to the
number of inversions. Devise an N log N algorithm for the problem.
d the user with the closest preferences. Measure "closest" according to the
number of inversions. Devise an N log N algorithm for the problem.