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Problem 172
Posted: Sat Dec 15, 2012 6:20 am
by mdean
I have posted a question in the thread for those who have completed the problem. Sadly, it's at the end of a long post as it wouldn't let me make a new post for just the question. It would be greatly appreciated if someone was able and willing to answer either in that thread or in a private message.
Re: Problem 172
Posted: Sat Dec 15, 2012 7:15 am
by sivakd
Replied in the private forum.
Re: Problem 172
Posted: Wed May 01, 2019 5:45 pm
by enigmaticcam
I have an algorithm that gives me an answer that is not correct. It matches my brute force algorithm up to 9 digits, but the brute force is too slow beyond that. Can anyone confirm these?
xxxx(removed)
Edit: whoops, I realized what my problem was. I was counting all digits up to 18-digit numbers, not just 18-digit numbers.