PuzzleUp 2009 (1) Stairway - 拼圖
By Sandy
at 2009-07-23T04:43
at 2009-07-23T04:43
Table of Contents
首頁:http://www.puzzleup.com/2009/?home
時限:2009/07/23(四)19:00~07/29(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
◆Stairway
某人爬樓梯時,一步可走1階、2階或3階。今有樓梯多達25階,請問他總共有幾種方
式可以爬完這座樓梯?
如果樓梯是四階,那麼答案將會是7種(1-1-1-1,1-1-2,1-2-1,2-1-1,2-2,1-3,
3-1)。
==============================================================================
我怎麼有一種在上數學課的感覺?=.="
「庭院深深深幾許」的惡夢又要來臨了嗎……囧……
==============================================================================
--
時限:2009/07/23(四)19:00~07/29(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
◆Stairway
某人爬樓梯時,一步可走1階、2階或3階。今有樓梯多達25階,請問他總共有幾種方
式可以爬完這座樓梯?
如果樓梯是四階,那麼答案將會是7種(1-1-1-1,1-1-2,1-2-1,2-1-1,2-2,1-3,
3-1)。
==============================================================================
我怎麼有一種在上數學課的感覺?=.="
「庭院深深深幾許」的惡夢又要來臨了嗎……囧……
==============================================================================
--
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