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Permutations count (Posted on 2015-10-01)

Find the number of permutations of (1,2,3...n) possessing the following feature:

The number n is the only local maximum e.g. 123465, 123564, 654321,
as opposed to 651432, 261354.

See The Solution Submitted by Ady TZIDON

Rating: 3.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

My misleading subject line.

| Comment 8 of 10 |

I wrote 'Simpler solution' before I typed my solution. I thought it would be shorter than it turned out to be. I was more responding to the call for a 'simple' proof.

I agree that mine isn't really any simpler than yours, Charlie.

Sorry if I offended.

Posted by Jer on 2015-10-02 13:38:33

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