I really wouldn't do it that way, because now you are dealing in billions of combinations (9,753,086,421 to be exact) which is worse than the 10! count for every possible permutation with no repeated digits.

Suppose the program could check a combination every .001 seconds. Then for an unsolvable problem where it had to try all 9.7 billion combinations, it would take about 112 days.

If you have to use brute-force rather than an AI-style search, at least use a permutation generator like Algorithm::Permute. If you don't need all 10 digits in the problem, then Algorithm::ChooseSubsets would also help.

In reply to Re: Re: Words that equal numbers by tall_man
in thread Words that equal numbers by Anonymous Monk

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