I have an array such as A-B-C-D-E-F-G-H-I-J-K I want to rotate it N places to the right; for example, if N=3, the array should end I-J-K-A-B-C-D-E-F-G-H

Assume that the only available operation is a FLIP method that can invert any portion of the array. For example, applied to the original array FLIP(3,6) would produce A-B-F-E-D-C-G-H-I-J-K.

(In reply to SOLUTION by Amitava)

for the examle at hand X=11 N=3

A-B-C-D-E-F-G-H-I-J-K

FLIP(1,11)

=> K-J-I-H-G-F-E-D-C-B-A

FLIP(4,11)

=> K-J-I-A-B-C-D-E-F-G-H

FLIP(1,3)

=>I-J-K-A-B-C-D-E-F-G-H

allright

 

Posted by Amitava on 2004-05-21 22:51:26