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$\begingroup$ I like this solution. I think there must be a way to reverse b for your if statement test to find the "reverse" outputs too... $\endgroup$
– Ali
Commented Oct 15, 2014 at 21:07
$\begingroup$ @Ali I don't think so - there's no easy way to find the most significant digits of those numbers. They must have millions of digits, and you can't drop any digits between multiplications. $\endgroup$
– Otaia
Commented Oct 15, 2014 at 21:49
$\begingroup$ We are still after the least significant digits, but they have to be the reverse of the numbers input, so instead of testing 999001 == 999001, it would test if 100999 == 999001 etc. $\endgroup$
– Ali
Commented Oct 15, 2014 at 22:16

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