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Omni-MATH / Given a rearrangement of the numbers from 1 to n, each pair of consecutive elements a and b of the sequence can be either increasing (if a<b ) or decreasing (if b<a ). How many rea… · Discussion

Discussing Given a rearrangement of the numbers from 1 to n, each pair of consecutive elements a and b of the sequence can be either increasing (if a<b ) or decreasing (if b<a ). How many rea… · Omni-MATH

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