题目网址: http://www.puzzleup.com/2018/
http://www.puzzleup.com/2018/puzzle/?17
答题时限: １１月22日７ＰＭ－比赛结束（约12月12日）
加分时限: １１月22日７ＰＭ－１１月28日６：５９ＰＭ
答对可得基本分１００分。答案可上传５次，每改１次答案从基本分扣２０分。
比赛期间内可随时上传答案，加分时限内答对第ｎ天加（６－ｎ）分　 　　 　
另依题目的难易有额外加分（如有８０％的人这题答错，答对者加８０分）　　
◆DIGITAL DISPLAY
http://www.puzzleup.com/2018/img/puzzle/2018/17.jpg
http://www.puzzleup.com/2018/img/puzzle/2018/17-1.png
A 2x2 digital display consists of 12 segments. You will create a shape
by turning some of the segments on. Rules:
‧ At least one of the segments will be on.
‧ When multiple segments are on, those segments will form a connected
shape.
How many different shapes can be created?
For example, for a square-shaped display with 4 segments, the answer
would be 13.
1 shape with all segments on; 4 shapes for one, two or three turned on
segments each.
http://www.puzzleup.com/2018/img/puzzle/2018/17-2.png
有个2x2的数位灯号，由十二个节段构成。你要点亮其中节段以构成图形。规则如下：
．至少要有一个节段是点亮的。
．如果有复数节段被点亮，则这些节段会是联通的。
问能构成多少种不同的图形？
举例来说，四个节段所构成的正方形灯号，答案会是13种。
全节段亮起1种；一节段4种；二节段与三节段亦同。