A place to air possible concerns or difficulties in understanding ProjectEuler problems. This forum is not meant to publish solutions. This forum is NOT meant to discuss solution methods or giving hints how a problem can be solved.
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Comments, questions and clarifications about PE problems.
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FourLegsDriveCat
- Posts: 21
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Post
by FourLegsDriveCat » Mon Dec 02, 2019 4:16 pm
Hi,
It's rather suggestion, not clarification.
Problem says:
the smallest positive integer k such that n+k is not divisible by k+1
Since
k starts from 1, the following examples seem unnecessary:
13 is divisible by 1
120 is divisible by 1
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jaap
- Posts: 542
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Post
by jaap » Tue Dec 03, 2019 6:51 am
I disagree. $k$ is essentially the length of the streak, i.e. how many consecutive lines in the two examples have divisibility before the line where it is no longer divisible. Like a lucky streak, it is about how long you can keep it going before your luck runs out. The divisibility by 1 is part of that, regardless of the fact that a streak can never have length zero.