Культурный офтопик
 help / color / mirror / Atom feed
From: Denis Kirienko <dk@altlinux.ru>
To: smoke-room@lists.altlinux.org
Subject: Re: [room] on binary search and merge-sort algos
Date: Mon, 20 Aug 2007 12:49:54 +0400
Message-ID: <fabkjk$qlt$1@sea.gmane.org> (raw)
In-Reply-To: <679044850708200131w20fca834oad4c5b42de00e281@mail.gmail.com>

Damir Shayhutdinov пишет:

> Если вы условие выхода из цикла не считаете за "деление массива",
> тогда третью часть можно вынести в это условие цикла.
> 
> unsigned low = 0;
> unsigned mid = 0;
> unsigned high = a.length - 1;
> 
> while (low <= high && a[mid] != key)
> {
>    mid = (low + high)  / 2;
>    if (a[mid] < key)
>       low = mid + 1;
>    else
>       high = mid - 1;
> }
> if (a[mid] == key) return mid;
> return -(low + 1);

То, что вы предлагаете - это тот же тернарный поиск, только проверка еще
одного условия вынесена в условие цикла.

--
Денис



  reply	other threads:[~2007-08-20  8:49 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-08-20  7:18 Michael Shigorin
2007-08-20  7:40 ` Denis Kirienko
2007-08-20  7:53   ` Damir Shayhutdinov
2007-08-20  8:00     ` Denis Kirienko
2007-08-20  8:31       ` Damir Shayhutdinov
2007-08-20  8:49         ` Denis Kirienko [this message]
2007-08-20 14:16           ` Damir Shayhutdinov
2007-08-20 14:38             ` Denis Kirienko
2007-08-20 15:35             ` Denis Kirienko
2007-08-20 17:08               ` Damir Shayhutdinov
2007-08-20  7:48 ` Damir Shayhutdinov
2007-08-20 17:07 ` Alexey Voinov
2007-08-20 19:33   ` Michael Shigorin

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='fabkjk$qlt$1@sea.gmane.org' \
    --to=dk@altlinux.ru \
    --cc=smoke-room@lists.altlinux.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Культурный офтопик

This inbox may be cloned and mirrored by anyone:

	git clone --mirror http://lore.altlinux.org/smoke-room/0 smoke-room/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 smoke-room smoke-room/ http://lore.altlinux.org/smoke-room \
		smoke-room@lists.altlinux.org smoke-room@lists.altlinux.ru smoke-room@lists.altlinux.com smoke-room@altlinux.ru smoke-room@altlinux.org smoke-room@altlinux.com
	public-inbox-index smoke-room

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://lore.altlinux.org/org.altlinux.lists.smoke-room


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git