[Community puzzle] Next car license plate?

Puzzles
#44

If you want to test custom cases using CodinGame’s IDE, you can do so by enabling EXPERT mode, found under SETTINGS on the left of the puzzle statement.

1 Like
#45

Maybe, but the issue I’m seeing isn’t the 1/1000 offset; What I’m seeing is being off every ~984880 iterations on the license number. Thanks for your input too :-).

#46

Thank you, and thank you for using caps so that I can clearly see what you’re trying to say :slight_smile:

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#47

My math isn’t the strongest, but being off by one on the wrapping value here would result in being off by two after 999*999 (=998001) wouldn’t it?

#48

I appreciate your suggestions for fixing the code, and what you have done to help me out. Unfortunately I’m using C# and not jerk to write my code :-).

#49

Well, I didn’t use caps so that you could clearly see them; I copied from the buttons themselves, which are labelled in caps! :grin:

1 Like
#50

Incrementing plate number step by step? Please no!!!
These kind of Puzzles just teach Programmers to be inefficient.

#51

My Program now passes all Test and all Validators except V6 with +1 000 000 . Could someone provide test cases that are more similar to V6 than Test6 ?
My Strategy was to first convert the Plate to 3 connected numbers, to keep the original structure but make adding easier.
Then do the adding while n is bigger than 0 and subtract everything from n that you add to one part of the Plate structure. Because I had 3 connected numbers (1 to 26*26)-(1 to 999)-(1 to 676) I managed to handle overflows of the last 2 numbers.
Then I reconvert the structure to a string License plate and put it out.
I also handled edge cases like ZZ->AA transition or 999->001.

Edit: I now tried a completely different approach. I converted the license plate to one number, then added n and then reconverted it to a string. The most difficult part was the reconversion to a string. This approach got my 100% on the Tests and also the Validators.
Thx for the Puzzle!

#52

The issue is usually this.

Try generating more edge cases to thoroughly test your code.

#53

Just a note on something that I was stuck on:

Spoiler

In the +100,000 case if you’re using sscan in a language like Golang. The language will try to interpret the number 010 as octal because it starts with a zero. Threw me for a loop for way too long :sweat_smile:

2 Likes
#54

Continuing the discussion from [Community puzzle] Next car license plate?:

I’ve validated the solution but I wasn’t satisfied because some edge cases were missing. So I tried
AA-998-AZ
1
with AA-999-AZ expected as a solution, and it failed. I think you should consider adding more edge cases.
AA-998-AA
1
is too simple because you don’t need to think about letter changes

Thanks for this funny puzzle !

#55

Also, Immatriculation : lettres interdites sur la plaque minéralogique

They removed “SS” in 2022.

But I guess making this puzzle more realistic has no point but to make it more cumbersome, and certainly not more interesting.