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Code Golf

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  • \$\begingroup\$ How slow is it? \$\endgroup\$ Commented Jan 9, 2016 at 12:31
  • \$\begingroup\$ @Loovjo tried on my PC with some small changes to make it faster, 15ms for n=5, 12 sec for n=6 (input +1, time * 800)! \$\endgroup\$ Commented Jan 9, 2016 at 14:26
  • \$\begingroup\$ @edc65 That was my experience. Anything greater than 5 the performance was dramatically slower. I didn't bother with trying inputs greater than 6. \$\endgroup\$ Commented Jan 9, 2016 at 14:50
  • \$\begingroup\$ I started with 7 when I posted my comment. We'll see \$\endgroup\$ Commented Jan 9, 2016 at 14:53
  • \$\begingroup\$ You can squeeze out a few more chars with #define d(x,y)b[x]*b[x+y]*b[x+y+y]; by changing the start of s to s(i,m){for(m=n-2; and replacing all instances of n-2; and by changing b[x]++ to b[x++]++ and then replacing x==n*n-1 with x==n*n, x+1 with x, and x with x-1. \$\endgroup\$ Commented Jan 16, 2016 at 22:33