In my understanding, ewijaya should automate the substring positioning as well as counting - what I think you have left as an exercise. This part would probably spoil your efficiency claim, because you're solving the problem from quite a convenient starting point :)

This said, I find the final computation quite elegant and istructive - I wouldn't have thought of XORing letters even in 100 years. There's always to learn, luckly, provided I'll be able to remember it when I'll need :)

Flavio (perl -e "print(scalar(reverse('ti.xittelop@oivalf')))")

Don't fool yourself.

In reply to Re^2: Substring Distance Problem by polettix
in thread Measuring Substrings Problem by monkfan

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