Yes, that's the cost.  The trick is to avoid initializing count altogether,
because for this subproblem M is much greater than n.  The answer is
algorithmic and not a matter of using this or that C operation.

Recently I had occasion to use the trick for M=65536 and n about 5000.  As
originally posed, I think the intention was that M would be zillions.



On Thu, Mar 6, 2014 at 12:59 PM, Joe Bogner <joebog...@gmail.com> wrote:

> On Thu, Mar 6, 2014 at 3:48 PM, Roger Hui <rogerhui.can...@gmail.com>
> wrote:
> >> Suppose M is really large and the cost of setting count to 0 is
> > prohibitive.  How can you avoid that cost?
> >> (Not saying it's related to finding the min or the max).
>
> To clarify, do you mean how can you avoid the cost of this operation?
>
> memset(b,0x00,sizeof(b));
>
> In my example I was using:
>
> for (; j < 32767; j++) {
> count[j] = 0;
> }
>
> Is this the cost you are referring to?
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