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Comment by ust | Hacker News Reader

I have the same number, do you think there is a reason why they are not all valid? EDIT: actually the number I calculate is 2796. Also using Python 2..

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Partly it might be due to needing "-10" at the end rather than -1 (I think I may have corrected it to -11 by mistake).

However, larger is the difference in how division works.

Python2: 3 / 2 => 1

Python3: 3 / 2 => 1.5

Would forcing the integer result fix this problem? Something like:

    def f(a, b, c, d, e, f, g, h, i):
        return a + int((13 * b * i + g * h * c) / (i * c)) + d + 12 * e - f - 11 - 10

If I try it like this, I still have the same number of solutions... Maybe I'm missing something..

EDIT: code formatting...

No, the problem is the other way around. Keeping them as integers and just using '/' is what's causnig the problem. You can either force them to be floats (not the result, the parameters in the calculation), or you can explicitly look for divisions that have remainders.

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