Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
here's another one i thought was correct: 77.
my $target = 5_001; # also tried 5_000 my $max = 1_000_000; my @primes; my $sieve = ''; # generate list of primes for (my $try=2; $try <= $max; $try++) { next if vec($sieve, $try, 1); push @primes, $try; for (my $mults=$try*$try; $mults <= $max; $mults+=$try) { vec($sieve, $mults, 1) = 1; } } # number of composites <= n # # # equivalent to number of primes between prime(n) and n, so that's wha +t # i'm doing here for (my $i=0; $i<@primes; $i++) { my $j = 0; $j++ while $primes[$j] <= $i+1; my $count = 0; $j++ && $count++ while $primes[$j] < $primes[$i]; next if $count < $target; printf "%d: %d\n", $i+1, $count; last; }

In reply to Re: Project Euler (a series of challenging mathematical/computer programming problems) by Anonymous Monk
in thread Project Euler (a series of challenging mathematical/computer programming problems) by BioGeek

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others scrutinizing the Monastery: (2)
    As of 2018-02-18 09:05 GMT
    Find Nodes?
      Voting Booth?
      When it is dark outside I am happiest to see ...

      Results (252 votes). Check out past polls.