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Optimal Order (Posted on 2016-02-10) Difficulty: 4 of 5

Consider Erase the right 90

Find a sequence of the numbers from 1 to 100, not necessarily in that order, such that exactly ten groups of 10 form exactly ten distinct subsequences, which need not be continuous, in each of strictly increasing and strictly decreasing order.

List the 20 subsequences.

No Solution Yet Submitted by broll    
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re(3): This should work Comment 5 of 5 |
(In reply to re(2): This should work by Jer)

The short answer, Jer, is that I have not found such a sequence myself, which is why I put it in the 'hard' category.

I'm still hoping someone else will find it!



  Posted by broll on 2016-02-14 20:36:16
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