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Here is pseudo code for the partition step of Quick Sort, which rearranges the subarray A[p ... r] in place and takes the last element
Here is pseudo code for the partition step of Quick Sort, which rearranges the subarray A[p ... r] in place and takes the last element as the pivot:
Partition(A, p, r){
x = A[r]
i = p-1
for j=p to r-1{
if A[j] x {
i = i + 1
swap A[i] with A[j]
}
}
swap A[i+1] with A[r]
return i+1
}
Which of the following is a useful loop invariant for this function?
Group of answer choices
A[r] is the pivot.
All entries in A[p ... i+1] are x.
All entries in A[p ... i] are x.
All entries in A[i+1 ... j1] are > x.
All entries in A[i ... j] are > x.
i j
Here is pseudo code for the partition step of Quick Sort, which rearranges the subarray A[p...r] in place and takes the last element as the pivot: Partition(A, P, TX x = A[r] i = p-1 for j=p to 1-1{ if A[j] SX{ i = i + 1 swap A[i] with A[j] swap A[i+1] with A[r] return 1+1 Which of the following is a useful loop invariant for this function? A[r] is the pivot. All entries in Ap ... i+1] are X. All entries in A[i ... j] are > X. OisStep by Step Solution
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