题目网址: http://www.puzzleup.com/2018/
http://www.puzzleup.com/2018/puzzle/?19
答题时限: １２月6日７ＰＭ－比赛结束（约12月19日）
加分时限: １２月6日７ＰＭ－１２月12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）　　
◆CLOSED AREAS
http://www.puzzleup.com/2018/img/puzzle/2018/19.jpg
http://www.puzzleup.com/2018/img/puzzle/2018/19-1.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.
‧ Turned on segments will create one or more closed area.
‧ Each turned on segment will be on the perimeter of a closed area.
How many different shapes can be created?
For example: for a 1x2 digital display with 7 segments the answer would
be 4.
2 shapes with 1 square, 1 shape with 2 squares and 1 shape with a rectangle.
http://www.puzzleup.com/2018/img/puzzle/2018/19-2.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。
．被点亮的节段会构成一个以上的封闭区块。
．每个被点亮的节段都会是封闭区块的周边。
问能构成多少种不同的图形？
举例来说，由7个节段所构成的1x2数位灯号，答案会是4种。
正方形区块2种，双正方形区块1种，长方形区块1种。