CONO-SUR 2010 Problem 2
On a line, points are marked and numbered from left to right. Various crickets jump around the line. Each starts at point , jumping on the marked points and ending up at point . In addition, each cricket jumps from a marked point to another marked point with a greater number. When all the crickets have finished jumping, it turns out that for pair with , there was a cricket that jumped directly from point to point , without visiting any of the points in between the two. Determine the smallest number of crickets such that this is possible.
Dataset text AI-MO AoPS. Quoted with source.
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