Hallo,
I implemented a solution in J for Euler problem 161.
It is very slow.
:-(
I use a big array to memoize the result and the amend operation
is very slow.
Here a snippet from my code
time =: 6!:2
W =: 9
H =: 12
C =: 2 ^ 2 * W
Mem =: ( C, W , H ) $ _1x
The amend take more than 4 seconds.
time 'Mem =: 4 ( < 1, 2, 3 ) } Mem'
4.136996
Is there a way to improve the amend time?
MfG
Luca Masini.
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