题目网址: http://www.puzzleup.com/2012/?home http://www.puzzleup.com/2012/puzzle/?249 答题时限: ９月13日７ＰＭ－比赛结束（约１２月１２日） 加分时限: ９月13日７ＰＭ－９月18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。 另有两种加分： １. 加分时限内答对。例：第Ｎ天答对，可加（６－Ｎ）分。 ２. 题目越困难，加分越多。例：这题有ｎ％的人答错，答对者加ｎ分。 ◆Edge Cuts The squares are drawn on a sheet of paper as shown in the first figure. Your task is to cut the edges of the squares. What is the maximum number of edges that can be cut without having the sheet separated into two or more pieces? http://www.puzzleup.com/2012/img/puzzle/2012/08_ek1.jpg As an example, 24 edge cuts are shown in the second figure. 图左的纸上画了如图这样的方格。你可以沿着方格的边线剪开。 试问在不将纸剪成两片或更多片的前提下最多可以剪开几个方格边？ 例如若剪开如图右的粗线部份，则一共剪开了 24 个方格边。 -- 抓到关键就不难的一题 -- 'Oh, Harry, don't you see?' Hermione breathed. 'If she could have done one thing to make absolutely sure that every single person in this school will read your interview, it was banning it!' ---'Harry Potter and the order of the phoenix', P513 --

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