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- 1$\begingroup$ Welcome to CS.SE! Generally the site works better with one question per post. I noticed you asked two questions. You might want to consider editing the question to remove the second one (the harder problem) and asking that separately. $\endgroup$D.W.– D.W. ♦2017-09-05 05:55:20 +00:00Commented Sep 5, 2017 at 5:55
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