2010-10-28から1日間の記事一覧
http://projecteuler.net/index.php?section=problems&id=28 http://odz.sakura.ne.jp/projecteuler/index.php?cmd=read&page=Problem%2028 Starting with the number 1 and moving to the right in a clockwise direction a 5 by 5 spiral is formed as fol…