2010-10-06から1日間の記事一覧
http://projecteuler.net/index.php?section=problems&id=6 The sum of the squares of the first ten natural numbers is, 12 + 22 + ... + 102 = 385 The square of the sum of the first ten natural numbers is, (1 + 2 + ... + 10)2 = 552 = 3025 Hence…