'Randomized partition' diaporamas de présentation

Sorting

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Order Statistics

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Quicksort

Quicksort. 6.1 Quicksort Quicksort ( A [ p .. r ]) Divide: ? A [ p .. r ] ?? A [ p .. q -1] ? A [ q +1.. r ] A A Conquer: ??? A [ p .. q -1] ? A [ q +1.. r ] ?? Combine: ???????. p. r. x. pivot. A [ p .. q -1]. q. A [ q +1.. r ]. x. Quicksort(A, p, r)

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Deterministic and Randomized Quicksort

Deterministic and Randomized Quicksort. Andreas Klappenecker. Overview. Deterministic Quicksort Modify Quicksort to obtain better asymptotic bound Linear-time median algorithm Randomized Quicksort. Deterministic Quicksort. Quicksort(A,p,r) if p < r then

458 views • 25 slides

Lecture 6

Lecture 6. Quicksort. 6.1 Quicksort Quicksort ( A [ p .. r ]) Divide: ? A [ p .. r ] ?? A [ p .. q -1] ? A [ q +1.. r ] A A Conquer: ??? A [ p .. q -1] ? A [ q +1.. r ] ?? Combine: ???????. p. r. x. pivot. A [ p .. q -1]. q. A [ q +1.. r ]. x. Quicksort(A, p, r)

390 views • 25 slides

Chapter 9: Median and Order Statistics Overview: What is an order statistic?

Chapter 9: Median and Order Statistics Overview: What is an order statistic? Selection means finding a particular order statistic Selection by sorting Selection in linear time best case worst case average case. What is an order statistic?.

361 views • 17 slides