xpymn.c:

/* Modular addition */
long xpymn(x,y,n) long x,y,n; {
   long result;

   if (n<=0)  return 0;
   result = (x+y) % n;

   return result;
}

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This snapshot was last modified on January 12th, 2009
And the underlying file was last modified on December 12th, 2005