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Category > Computer Science Posted 25 Aug 2017 My Price 5.00

inversions of the array

Inversions

Let A[1 ? n] be an array of n distinct numbers. If i < j and A[i] > A[j], then the pair (i, j) is called an inversion of A.

a. List the five inversions of the array ?2, 3, 8, 6, 1?.

b. What array with elements from the set {1, 2, . . . , n} has the most inversions? How many does it have?

c. What is the relationship between the running time of insertion sort and the number of inversions in the input array? Justify your answer.

d. Give an algorithm that determines the number of inversions in any permutation on n elements in Θ(n lg n) worst-case time. (Hint: Modify merge sort.)

 

Chapter 3: Growth of Functions

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Maurice Tutor
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Status NEW Posted 25 Aug 2017 08:08 AM My Price 5.00

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