Thread: September 2021
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Old 2021-09-13, 20:12   #7
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"Kebbaj Reda"
May 2018
Casablanca, Morocco

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Originally Posted by dg211 View Post
Remember you can use hyphens in both strings.

I'm impressed people managed to get solutions that good with pen and paper, I didn't even try that approach because I thought it would be too hard.
I am also impressed by the strength of formalizing the question and being able to code it. A question not easy to formalize.
But there, I'am obliged to get help with the calculation.
There are 1680 possible permutations from 2 to 9 for each quadruplet. I leave the 0's and 1's, they don't do a lot of damage.

Congrats, for this impressed solution 40 and 147.
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