The problem is, you could have as many as i (where i = 1 to n) "best candidates" at any time. Consider — if the list looks like this:
9 7 5 3 1 x
(i.e. you've processed all but the last number) you won't know until you look at the last number which of the preceding numbers (if any) are in the solution.
x could be 10, or it could be 2, for example.
So you need to keep all the increasing subsequences seen so far; and that could be as many as n; and that means the algorithm is at least O(n log n).
We're building the house of the future together.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
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:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- 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
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||