推 tw00088437:可是前陣子的題目 好像沒啥人想玩了.. = =" 11/11 19:33
首頁：http://www.puzzleup.com/2010/
時限：2010/11/11（四）19:00～11/17（三）18:59
答案可上傳５次，但每改１次扣２０分（基本分為１００分）
在比賽期間內可隨時回答，但只有在時限內回答者有額外加分
◆Three Digits
You have a number where any numeral appears at most twice. The sum of all
neighboring three digits in this number is a square number.
What is the maximum possible value for this number?
Example: 74504 is such a number because no numeral appears more than twice
and 7+4+5, 4+5+0 and 5+0+4 are square numbers.
你有個數，每個數字多出現兩次。所有相鄰的三位數的和是平方數。
問此數最大多少？
例如：74504即為符合條件之數，因為每個數字皆沒有出現多於兩次，
且 7+4+5，4+5+0，5+0+4 皆為平方數。
--
不算難...紙筆應該能解答
--
'You've sort of made up for it tonight,' said Harry. 'Getting the
sword. Finishing the Horcrux. Saving my life.'
'That makes me sound a lot cooler then I was,' Ron mumbled.
'Stuff like that always sounds cooler then it really was,' said
Harry. 'I've been trying to tell you that for years.'
-- Harry Potter and the Deathly Hollows, P.308
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 140.112.28.92
※ 編輯: LPH66 來自: 140.112.28.92 (11/11 10:36)