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Very interesting puzzle, but not from the obvious reasons.
The problem at hand is relatively straight forward, but trying to provide an elegant solution proved to be more challenging than I expected.
Well done for the puzzle creator for taking such a familiar problem and providing a fun and unexpected challenge
Thanks a lot for this very kind message!
Actually, I had the idea of the puzzle and then struggled a bit to provide the solution…
My solution uses regular expressions to get the ships positions.
I guess I could be surprised seeing how players solved the problem!
I resolved this puzzle, very funny !!
All my tests case are ok, but i’ve got an error when i submit my solution.
The validation n° 3 is KO. I tryed a lot of configuration, but all are good. I think i don’t see a case, but can’t find it.
Can you give me an indication ?
I found the mistake, that was due the ambigous rules : we have to detect invalid boat on a cell before detecting the boats collision.
For example :
must return error for the size of the boat (6), instead of the collision.
Very nice puzzle, had fun solving it. Looking through other solutions I noticed an interesting thing that some people for Y coordinate of the shot take only first digit of the input and in “Touche” test case both J10 and J1 contain a ship, making it pass by lucky chance. My suggestion: move the ship in first row one line down.