Sorry - I did not intend to send this to the group.
Mike
Mike Day wrote:
Thanks.
I took an age on 149 - just couldn't get the right
answer, but always got the same one - so hacked away
at the mrs subproblem - which is most of the challenge
of course - and only slowly realised that I'd merely
got in a tangle allowing for Euler's use of index
origin 1, and had got the stitching wrong between
elements 55 & 56 (while still getting 100 ok)!!!
After correcting that, the answer came readily. I only
came across (well, remembered) Eugene's essay when
checking that the J/K/APL community hadn't produced
something as good when considering writing this up.
Despite appearances, the p150 summation isn't as hard.
BTW, and by way of return of compliments, I liked
your pseudo-prime congruence class stuff for that
consecutive primes problem. I don't like the way
J runs like a superfast TGV when I'm exploring the
foothills of a problem, and then chokes to a halt,
can't be interrupted and has to be restarted etc
as soon as I tentatively add half an order of
magnitude to the test-problem size. Same tends to happen when I slip
an x: in at the wrong point.
Perhaps p: needs a bit more extending with some
possibility of choice of level of pseudo-primeness.
All the best
Mike
John Randall wrote:
Mike Day wrote:
I needed an efficient verb for finding the maximum
running sum of an array. I seem to have stumbled on
a really good one, which surprisingly appears to be
better than Eugene's J version of a K verb mentioned
in the correspondence below.
Nice solution, Mike! I used Eugene's verb to solve #149. Still have
not
done #150, though.
Best wishes,
John
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