Re^2: Bidirectional lookup algorithm? (Updated: further info.)

(numbers past a certain point are stringified to the same thing)

I have 64-bit ints here, so that isn't a problem for me.

I did consider packing the keys, but the space saved is only around 15% to 20%; but the performance penalty is considerable. Thanks.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

Comment on Re^2: Bidirectional lookup algorithm? (Updated: further info.)