Some problems are so complex that you have to be highly intelligent and well informed just to be undecided about them.
Laurence J. Peter
I am doing a startup!
Cross-browser testing from your browser!
I have written my fourth book!
Be faster than Larry Wall at command line!
You're viewing a comment by Bron Gondwana and its responses.
I did it in perl - and not terribly efficiently. Generated the primes up to 30,000,000 because that's about all that the simple sieve code I found would do in the 4Gb of memory I had available, figured it was probably enough.
And keeping ALL the lists in memory as both arrays and hashes was actually not too bad - wrote it in about 10 minutes and it took another 5 to run. Woot.
My first-pass recursive attempt at the robots thing was totally intractable, and the second time when I forgot to "use bigint" I actually submitted the wrong number through doing insufficient checking (oh the embarassment) - but once you figure that: value(N, M) == value(N - 1, M) + value (N, M - 1) and value (1, x) == value (y, 1) == 1, then it's pretty trivial to just build an N x M array and calculate the values.
It is nice having a multi-core modern machine with 4Gb of ram for the prime problem though - it makes brute force much cheaper, and coming up with a good algorithm for a once-off computation rather worthless.
(why do I need your e-mail?)
It would be nice if you left your e-mail address. Sometimes I want to send a private message, or just thank for the great comment. Having your e-mail really helps.
I will never ever spam you.
(Your twitter name, if you have one. (I'm @pkrumins, btw.))
* use <pre>...</pre> to insert a plain code snippet.
* use <pre lang="lang">...</pre> to insert a syntax highlighted code snippet.
For example, <pre lang="python">...</pre> will insert Python highlighted code.
* use <code>...</code> to highlight a variable or a single shell command.
* use <a href="url" nospam>title</a> to insert links.
<a href="url" nospam>title</a>
* use other HTML tags, such as, <b>, <i>, <blockquote>, <sup>, <sub> for text formatting.
Type the word "halflife3_64": (just to make sure you're a human)
Please preview the comment before submitting to make sure it's OK.
Peteris Krumins' blog about programming, hacking, software reuse, software ideas, computer security, google, browserling and technology.
Reach me at:
Or meet me on:
Subscribe through an RSS feed:
(what is rss?)
Subscribe through email:
Enter your email address:
Delivered by FeedBurner
I love to read science books. They make my day and I get ideas for awesome blog posts, such as Busy Beaver, On Functors, Recursive Regular Expressions and many others.
Take a look at my Amazon wish list, if you're curious about what I have planned reading next, and want to surprise me. :)
See all top articles
See all downloads
See more detailed list of recent articles
See more detailed category information
See more detailed list of all articles