mirror of
https://github.com/krahets/hello-algo.git
synced 2026-04-13 14:10:00 +08:00
deploy
This commit is contained in:
krahets
@@ -3444,7 +3444,32 @@
|
||||
<div class="md-content" data-md-component="content">
|
||||
<article class="md-content__inner md-typeset">
|
||||
|
||||
|
||||
<!--
|
||||
Copyright (c) 2016-2023 Martin Donath <martin.donath@squidfunk.com>
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to
|
||||
deal in the Software without restriction, including without limitation the
|
||||
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
||||
sell copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||||
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
||||
IN THE SOFTWARE.
|
||||
-->
|
||||
|
||||
<!-- Tags -->
|
||||
|
||||
|
||||
<!-- Actions -->
|
||||
|
||||
|
||||
<a href="https://github.com/krahets/hello-algo/tree/main/docs/chapter_backtracking/n_queens_problem.md" title="编辑此页" class="md-content__button md-icon">
|
||||
@@ -3455,6 +3480,13 @@
|
||||
|
||||
|
||||
|
||||
<!--
|
||||
Hack: check whether the content contains a h1 headline. If it doesn't, the
|
||||
page title (or respectively site name) is used as the main headline.
|
||||
-->
|
||||
|
||||
|
||||
<!-- Page content -->
|
||||
<h1 id="134-n">13.4 N 皇后问题<a class="headerlink" href="#134-n" title="Permanent link">¶</a></h1>
|
||||
<div class="admonition question">
|
||||
<p class="admonition-title">Question</p>
|
||||
@@ -4031,11 +4063,73 @@
|
||||
<p>逐行放置 <span class="arithmatex">\(n\)</span> 次，考虑列约束，则从第一行到最后一行分别有 <span class="arithmatex">\(n\)</span>、<span class="arithmatex">\(n-1\)</span>、<span class="arithmatex">\(\dots\)</span>、<span class="arithmatex">\(2\)</span>、<span class="arithmatex">\(1\)</span> 个选择，<strong>因此时间复杂度为 <span class="arithmatex">\(O(n!)\)</span></strong> 。实际上，根据对角线约束的剪枝也能够大幅地缩小搜索空间，因而搜索效率往往优于以上时间复杂度。</p>
|
||||
<p>数组 <code>state</code> 使用 <span class="arithmatex">\(O(n^2)\)</span> 空间，数组 <code>cols</code>、<code>diags1</code> 和 <code>diags2</code> 皆使用 <span class="arithmatex">\(O(n)\)</span> 空间。最大递归深度为 <span class="arithmatex">\(n\)</span> ，使用 <span class="arithmatex">\(O(n)\)</span> 栈帧空间。因此，<strong>空间复杂度为 <span class="arithmatex">\(O(n^2)\)</span></strong> 。</p>
|
||||
|
||||
<!-- Source file information -->
|
||||
|
||||
|
||||
<!-- Was this page helpful? -->
|
||||
|
||||
|
||||
|
||||
|
||||
<h2 id="__comments">评论</h2>
|
||||
<!-- Previous and next pages link -->
|
||||
<nav
|
||||
class="md-footer__inner md-grid"
|
||||
aria-label="页脚"
|
||||
|
||||
>
|
||||
|
||||
<!-- Link to previous page -->
|
||||
|
||||
|
||||
<a
|
||||
href="../subset_sum_problem/"
|
||||
class="md-footer__link md-footer__link--prev"
|
||||
aria-label="上一页: 13.3 &nbsp; 子集和问题"
|
||||
rel="prev"
|
||||
>
|
||||
<div class="md-footer__button md-icon">
|
||||
|
||||
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12Z"/></svg>
|
||||
</div>
|
||||
<div class="md-footer__title">
|
||||
<span class="md-footer__direction">
|
||||
上一页
|
||||
</span>
|
||||
<div class="md-ellipsis">
|
||||
13.3 子集和问题
|
||||
</div>
|
||||
</div>
|
||||
</a>
|
||||
|
||||
|
||||
<!-- Link to next page -->
|
||||
|
||||
|
||||
<a
|
||||
href="../summary/"
|
||||
class="md-footer__link md-footer__link--next"
|
||||
aria-label="下一页: 13.5 &nbsp; 小结"
|
||||
rel="next"
|
||||
>
|
||||
<div class="md-footer__title">
|
||||
<span class="md-footer__direction">
|
||||
下一页
|
||||
</span>
|
||||
<div class="md-ellipsis">
|
||||
13.5 小结
|
||||
</div>
|
||||
</div>
|
||||
<div class="md-footer__button md-icon">
|
||||
|
||||
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M4 11v2h12l-5.5 5.5 1.42 1.42L19.84 12l-7.92-7.92L10.5 5.5 16 11H4Z"/></svg>
|
||||
</div>
|
||||
</a>
|
||||
|
||||
</nav>
|
||||
|
||||
<!-- Comment system -->
|
||||
|
||||
<h5 align="center" id="__comments">欢迎你提出疑问或建议</h5>
|
||||
<!-- Insert generated snippet here -->
|
||||
<script
|
||||
src="https://giscus.app/client.js"
|
||||
@@ -4101,48 +4195,31 @@
|
||||
|
||||
</main>
|
||||
|
||||
<footer class="md-footer">
|
||||
|
||||
|
||||
|
||||
<nav class="md-footer__inner md-grid" aria-label="页脚" >
|
||||
|
||||
|
||||
<a href="../subset_sum_problem/" class="md-footer__link md-footer__link--prev" aria-label="上一页: 13.3 &nbsp; 子集和问题" rel="prev">
|
||||
<div class="md-footer__button md-icon">
|
||||
|
||||
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12Z"/></svg>
|
||||
</div>
|
||||
<div class="md-footer__title">
|
||||
<span class="md-footer__direction">
|
||||
上一页
|
||||
</span>
|
||||
<div class="md-ellipsis">
|
||||
13.3 子集和问题
|
||||
</div>
|
||||
</div>
|
||||
</a>
|
||||
|
||||
|
||||
|
||||
<a href="../summary/" class="md-footer__link md-footer__link--next" aria-label="下一页: 13.5 &nbsp; 小结" rel="next">
|
||||
<div class="md-footer__title">
|
||||
<span class="md-footer__direction">
|
||||
下一页
|
||||
</span>
|
||||
<div class="md-ellipsis">
|
||||
13.5 小结
|
||||
</div>
|
||||
</div>
|
||||
<div class="md-footer__button md-icon">
|
||||
|
||||
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M4 11v2h12l-5.5 5.5 1.42 1.42L19.84 12l-7.92-7.92L10.5 5.5 16 11H4Z"/></svg>
|
||||
</div>
|
||||
</a>
|
||||
|
||||
</nav>
|
||||
|
||||
|
||||
<!--
|
||||
Copyright (c) 2016-2023 Martin Donath <martin.donath@squidfunk.com>
|
||||
|
||||
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
of this software and associated documentation files (the "Software"), to
|
||||
deal in the Software without restriction, including without limitation the
|
||||
rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
||||
sell copies of the Software, and to permit persons to whom the Software is
|
||||
furnished to do so, subject to the following conditions:
|
||||
|
||||
The above copyright notice and this permission notice shall be included in
|
||||
all copies or substantial portions of the Software.
|
||||
|
||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
|
||||
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
||||
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
||||
IN THE SOFTWARE.
|
||||
-->
|
||||
|
||||
<!-- Footer -->
|
||||
<footer class="md-footer">
|
||||
<!-- Further information -->
|
||||
<div class="md-footer-meta md-typeset">
|
||||
<div class="md-footer-meta__inner md-grid">
|
||||
<div class="md-copyright">
|
||||
@@ -4153,6 +4230,8 @@
|
||||
|
||||
|
||||
</div>
|
||||
|
||||
<!-- Social links -->
|
||||
|
||||
<div class="md-social">
|
||||
|
||||
|
||||
Reference in New Issue
Block a user