Cormen Edition 3 Exercise 7.1 Question 1 (Page No. 173)

Question

PARTITION(A,p,r)

1    x = A[r]
2    i = p – 1
3    for j = p to r – 1
4    if A[j] <= x
5    i = i + 1
6    exchange A[i] with A[j]
7    exchange A[i+1] with A[r]
8    return i + 1

 

illustrate the operation of PARTITION on the array $A=\langle 13,19,9,5,12,8,7,4,21,2,6,11\rangle$

Comments

Answer this question

Answer 1

[13,19,9,5,12,8,7,4,21,2,6,11] //Initially

[9,19,13,5,12,8,7,4,21,2,6,11]

[9,5,13,19,12,8,7,4,21,2,6,11]

[9,5,8,19,12,13,7,4,21,2,6,11]

[9,5,8,7,12,13,19,4,21,2,6,11]

[9,5,8,7,4,13,19,12,21,2,6,11]

[9,5,8,7,4,2,19,12,21,13,6,11]

[9,5,8,7,4,2,6,12,21,13,19,11]

[9,5,8,7,4,2,6,11,21,13,19,12]