FYI: Problem 28 in www.ProjectEuler.net is as follows: Starting with the number 1 and moving to the right in a clockwise direction a 5 by 5 spiral is formed as follows:
21 22 23 24 25 20 7 8 9 10 19 6 1 2 11 18 5 4 3 12 17 16 15 14 13 It can be verified that the sum of both diagonals is 101. What is the sum of both diagonals in a 1001 by 1001 spiral formed in the same way? ----- Original Message ----- From: Joey <[EMAIL PROTECTED]> Date: Sunday, December 2, 2007 15:43 Subject: Re: [Jprogramming] New to J To: Programming forum <[email protected]> > Yes, I found [ -(i.4) * ], soo after your post. > > I am using that particular code here: > f =: 3 : 'x:+/y -(i.4)*] (%:y)+_1' > 1++/f"0 *:>:2*>:i.500 > Which is #28 on Project Euler, which I am using to learn J! > > I tried f =: 13 : 'x:+/y -(i.4)*] (%:y)+_1', then f; but the > result was > boxed, and I wasn't sure how it should be formatted. > So how can I replace the definiton of f, into 1++/f"0 *:>:2*>:i.500. > And are there any things I am doing wrong in my code? ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
