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

9910 Posts

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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