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Comments in green were written by me. Comments in blue were not written by me.

2021-01-03

Happy New Year, one and all!

I think your links point to last yearâ€™s calendar puzzles. As for how to solve the puzzle on 21 December, - permutations of [1,...,n+1] having no substring [k,k+1] - is an option.

(anonymous)
on /blog/88

2021-01-03

@(anonymous): Thanks, links corrected

Matthew
on /blog/88

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