notes16b

npn lets say all the probabilities are the same pk

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Unformatted text preview: . + Pn ≤ 1 ! !! Pk ≤ 1 • In a linked list, to retrieve a value at position k, takes k steps Texp = 1*P1 + 2*P2 + ... + n*Pn • Lets say all the probabilities are the same Pk = 1/n Texp = (1+2+3+...+n)/n = (n+1)/2 ß།average time for retrieving a value If the probabilities are not equal, to minimize Texp, P1 ≥ P2 ≥ P3 ≥ ... ≥ Pn o We may need to reorder...
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