change a n^2 algorithm in

change a n^2 algorithm in
data initialization to n*log(n)

[ken3, 2009-11-17 21:59:40]

*** Submitted as http://code.google.com/p/go/source/detail?r=d20053e7fdaf ***

change a n^2 algorithm in
data initialization to n*log(n)

R=rsc
http://codereview.appspot.com/158041

[rsc, 2009-11-17 22:29:08]

LGTM