Puzzleup 2014 (13) Points and Arrows - 拼圖
By Blanche
at 2014-10-22T22:07
at 2014-10-22T22:07
Table of Contents
題目網址: http://www.puzzleup.com/2014/
http://www.puzzleup.com/2014/puzzle/?254
答題時限: 10月23日7PM-比賽結束(約12月17日)
加分時限: 10月23日7PM-10月29日6:59PM
答對可得基本分100分。答案可上傳5次,每改1次答案從基本分扣20分。
比賽期間內可隨時上傳答案,加分時限內答對第n天加(6-n)分
另依題目的難易有額外加分(如有80%的人這題答錯,答對者加80分)
◆Points and Arrows
There are X points drawn on a paper. The points are connected by one-way
arrows. All the points have exactly 4 arrows coming in, and exactly 4 arrows
coming out.
If it is possible to reach to any point from any other point by following no
more than two arrows, what can be the maximum value of X?
在紙上有 X 個點。點與點之間以有向箭頭連結。
所有點都有正好 4 個連入箭頭以及正好 4 個連出箭頭。
若可以由任一點沿著不多於兩個箭頭到達其他任一點,問 X 的最大值為何?
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1985/01/12 三嶋鳴海 1989/02/22 優希堂悟 1990/02/22 冬川こころ 1993/07/05 小町
つぐみ 歡迎來到 1994/05/21 高江ミュウ 1997/03/24 守野いづみ 1997/03/24 伊野瀬
チサト 1998/06/18 守野くるみ 打越鋼太郎的 1999/10/19 楠田ゆに 2000/02/15 樋口遙
2002/12/17 八神ココ 2011/01/11 HAL18於朱倉岳墜機 ∞與∫的世界 2011/04/02 茜崎空
啟動 2012/05/21 第貮日蝕計畫預定 2017/05/01~07 LeMU崩壞 2019/04/01~07 某大學合宿
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