Problem 1448. Create Volcano (or Atoll) martix. It is an extension of Bullseye matrix problem.

For example, if n=2 (maximum value), the output matrix should be

 [1 1 1 1 1;
  1 2 2 2 1;
  1 2 1 2 1;
  1 2 2 2 1;
  1 1 1 1 1]

where you go from inside to outside starting from 1 to 2(maximum value) and again move back from 2 to 1.

Solve

Last Solution submitted on Jan 04, 2020

Ned Gulley on 24 Apr 2013

You should call this a volcano matrix!

Richard Zapor on 27 Apr 2013

Could also be named an Atoll matrix

Chintan on 27 Apr 2013

Thanks Ned, Richard for good suggestion. I have changed Problem Title accordingly.

bainhome on 28 May 2015

nice!this is the easiest way to translate to another language.

bullseye