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That's great!

So, you figured out that the loop control for this problem should have been completely equivalent to your integer version, right?


BigInteger num = BigInteger.ONE;
...

And you didn't notice that it was different from the answer(s) that I posted? I always try to come up with an independent way to check my work, and I even showed the answer obtained from an...

Well...

I just registered at projecteuler.net and submitted the answer to problem #15 that I have posted here several times: 137846528820
It was accepted.

I am apparently the 55434th person...

I meant that I won't go into the combinatorial "solution" any more. (Well not after these few words.)
What I like about the combinatorial solution is that I can arrive at a closed formula without...

I have no connection with or knowledge of Project Euler, and I don't have any ideas about anything else outside the discussion in my post.

Here's the thing:


I believe my description of how...

IF you have never heard of "the number of combinations of N things taken K at a time, you might start here: Combinations-Wikipedia

The number of combinations of N things taken K at a time is given...

Well, since you put it that way, here are my thoughts:


I will restate the problem in a way that is specific enough for me to boil it down to something that is not very complicated (to me).

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