Python Challenge: Bagels

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#1 Simown

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Python Challenge: Bagels

Posted 02 January 2013 - 01:29 PM

This week's Python Challenge is aimed for those of you nursing sore heads from New Year's Eve Festivities. That is, it's not extremely challenging. However, it's got a few little hurdles to get over, so it should be a good way to occupy your fuzzy brain while you knock back a few glasses of the hair of the dog what bit you.

The challenge is to implement the game "Bagels" as described in David Ahl's collection of "Basic Games". A link to the original article, with BASIC source code is provided, in case that might be helpful.

The game is simplicity itself:

The computer picks a three-digit number. The player's task is to guess the number by submitting three-digit guesses. The computer provides feedback thusly:

- If the guess is entirely correct, the player wins.
- If the guess includes at least one digit that is in the correct place, the computer reports "Fermi".
- If the guess includes at least one digit contained in the target number, but it's in the wrong place, the computer reports "Pico".
- If the guess is entirely wrong, the computer reports "Bagels".

Only one response will be provided for a given guess, so if the target is 123 and the guess is 132, the response will be "Fermi" and not "Fermi, Pico".

You get twenty guesses.

That's it.

Your first task is to implement the game for a human solver. The computer will pick a number, and the human player will determine what it was.

For extra sport, write a computer that can zero in on a number you provide. How many guesses does your computer player require to find the correct number?

Hint
Be careful of how you handle leading zeros in the input. If you convert the input to integer form, be careful not to lose any information, or at least to ensure you recover the information you lose.

This post has been edited by Simown: 05 January 2013 - 05:25 PM

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Replies To: Python Challenge: Bagels

#2 fashionnugget

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Re: Python Challenge: Bagels

Posted 02 January 2013 - 05:42 PM

Why not? I haven't posted in like a year.

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#3 macosxnerd101

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Re: Python Challenge: Bagels

Posted 02 January 2013 - 06:01 PM

Here is my solution for the basic stage (in Java). Now to get to work on the AI portion.

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#4 CasiOo

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Re: Python Challenge: Bagels

Posted 02 January 2013 - 07:53 PM

macosxnerd101, on 03 January 2013 - 01:01 AM, said:

Here is my solution for the basic stage (in Java). Now to get to work on the AI portion.

Spoiler

If you make an interface for the AI's to implement, then I will happily use your example and make an AI to it
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#5 Simown

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Re: Python Challenge: Bagels

Posted 05 January 2013 - 02:03 PM

Oh no, what have I done? First section done in Python with some nice little tricks for a bit of fun. Works fine but could do with some better error-checking really.

Spoiler

This post has been edited by Simown: 05 January 2013 - 03:51 PM

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#6 darek9576

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Re: Python Challenge: Bagels

Posted 05 January 2013 - 02:13 PM

Is it common in Python to return different data types? Like here, you return 0 under one condition, otherwise you return a string.

This post has been edited by darek9576: 05 January 2013 - 02:15 PM

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#7 AdamSpeight2008

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Re: Python Challenge: Bagels

Posted 05 January 2013 - 02:26 PM

Python is Dynamic language, you can return whatever you want.
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#8 Simown

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Re: Python Challenge: Bagels

Posted 05 January 2013 - 03:38 PM

darek9576, on 05 January 2013 - 09:13 PM, said:

Is it common in Python to return different data types? Like here, you return 0 under one condition, otherwise you return a string.

You can, but I don't think it's common - I'd say it certainly wasn't good practice. In Python all non-empty strings are going to evaluate to True (like most languages?) and the 0 to False, which means that the "You win!" will print only if 0 is returned. I could have substituted the empty string in there (which probably would make more sense to maintain the same data type)

Honestly, it's not the kind of code you'd want to maintain or actually use, just showing off some Pythonisms

This post has been edited by Simown: 05 January 2013 - 04:55 PM

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#9 darek9576

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Re: Python Challenge: Bagels

Posted 05 January 2013 - 03:51 PM

I know Python allows to return different types but my question was whether it's a good practice. Thanks for the answer.
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#10 AdamSpeight2008

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Re: Python Challenge: Bagels

Posted 05 January 2013 - 05:54 PM

A VB.net version for comparison, using Event to decouple to output.
Uses the iterator feature for input.
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This post has been edited by AdamSpeight2008: 05 January 2013 - 05:54 PM

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#11 blackcompe

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Re: Python Challenge: Bagels

Posted 05 January 2013 - 10:06 PM

A Scala version.

Spoiler

If you know Java and you want to try to implement the auto solver, do the following:

Spoiler

This post has been edited by blackcompe: 07 January 2013 - 09:17 PM

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#12 blackcompe

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Re: Python Challenge: Bagels

Posted 07 January 2013 - 09:16 PM

I can't find any information on a standard algorithm to solve this problem. I believe that anything I'd implement would solve it in about 15 steps on average, and that's just coding the logic I'd use to solve it. Any thoughts?
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#13 Simown

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Re: Python Challenge: Bagels

Posted 08 January 2013 - 09:06 AM

I wouldn't think there was a standard algorithm either. I've been playing with this and I can't make a correct guess *every* time yet, is the one you are thinking of more reliable? That's probably the best algorithm you could get for this problem? I wouldn't know either.
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#14 blackcompe

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Re: Python Challenge: Bagels

Posted 08 January 2013 - 04:40 PM

Quote

I wouldn't think there was a standard algorithm either. I've been playing with this and I can't make a correct guess *every* time yet, is the one you are thinking of more reliable?

No, my algorithm wouldn't solve it every time.
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#15 Simown

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Re: Python Challenge: Bagels

Posted 09 January 2013 - 07:51 AM

I think basically, there is too many possibilities before you can hone in on a number, this challenge is actually slightly different from the BASIC one, as Jon made the restriction only one answer can be returned i.e. Bagels, Pico or Fermi not multiple clues - if you could return more than one "hint", you could make a better guess I assume.

However, I don't think this can be algorithmically solved anyway, it's just mimicking human logic as you say. The BASIC challenge says, assuming you can return Pico or Fermi for each digit or Bagels you should be able to solve every one in 8 moves or less. I'm going to try it that way and see where I get
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