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This was a fun one. My solution looks quite similiar to Abigail's in structure, but is not nearly so elegant.

I question how they are really going to judge these based on execution time. Its basically a "find the needle in a haystack" problem, but after you've found it, its pretty easy to write a program that finds it faster the next time around.

For instance: Which one of these wins? Are any thrown out for "cheating"?

1: Brute force, try every concievable set of four numbers (loooong time)

2: Using some sort of filtering at each stage, so not every set of four is used (much quicker)

3: Cleverly ordering the stages, so they are done in an optimum order -- perhaps 'THREE->TEN->ONE->SIX'. (slightly quicker, though is uses information gathered in program 2)

4: Brute force, but coded so that the first set of four you try is the correct answer. (even faster!!!)

5: print "$answer"; (clearly the fastest)

Since there is only one haystack and one needle, how do you determine which program "finds" it, and which has already been told where it is....


In reply to Re: (Efficiency Golf) Triangular numbers by blakem
in thread (Efficiency Golf) Triangular numbers by jepri

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