algorithm/hello-algo
1
0
Fork 0
mirror of https://github.com/krahets/hello-algo.git synced 2025-08-02 11:33:18 +08:00
Code Issues Packages Projects Releases Wiki Activity

deploy

Browse Source
This commit is contained in:
krahets
2023-07-26 08:59:03 +08:00
parent fd34c845bc
commit 974fea7de4
48 changed files with 299 additions and 299 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
chapter_backtracking/subset_sum_problem/index.html
View File

@ -3733,8 +3733,8 @@
</ol>
<p>分支越靠右，需要排除的分支也越多，例如：</p>
<ol>
<li>前两轮选择 <span class="arithmatex">\(3\)</span> , <span class="arithmatex">\(5\)</span> ，生成子集 <span class="arithmatex">\([3, 5, \cdots]\)</span> ；</li>
<li>前两轮选择 <span class="arithmatex">\(4\)</span> , <span class="arithmatex">\(5\)</span> ，生成子集 <span class="arithmatex">\([4, 5, \cdots]\)</span> ；</li>
<li>前两轮选择 <span class="arithmatex">\(3\)</span> , <span class="arithmatex">\(5\)</span> ，生成子集 <span class="arithmatex">\([3, 5, \cdots]\)</span> 。</li>
<li>前两轮选择 <span class="arithmatex">\(4\)</span> , <span class="arithmatex">\(5\)</span> ，生成子集 <span class="arithmatex">\([4, 5, \cdots]\)</span> 。</li>
<li>若第一轮选择 <span class="arithmatex">\(5\)</span> ，<strong>则第二轮应该跳过 <span class="arithmatex">\(3\)</span> 和 <span class="arithmatex">\(4\)</span></strong> ，因为子集 <span class="arithmatex">\([5, 3, \cdots]\)</span> 和子集 <span class="arithmatex">\([5, 4, \cdots]\)</span> 和 <code>1.</code> , <code>2.</code> 中生成的子集完全重复。</li>
</ol>
<p><img alt="不同选择顺序导致的重复子集" src="../subset_sum_problem.assets/subset_sum_i_pruning.png" /></p>