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Rotating an array (Posted on 2004-04-19) Difficulty: 2 of 5
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.

See The Solution Submitted by e.g.    
Rating: 4.0000 (13 votes)

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re: 10 step method | Comment 17 of 26 |
(In reply to 10 step method by logischer Verstand)

The first step is wrong; FLIP(1,9) would produce I-H-G-F-E-D-C-B-A-J-K. The only correct line is the tenth.
  Posted by Federico Kereki on 2004-04-20 12:38:19

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