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krahets
2023-09-17 01:11:45 +08:00
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chapter_backtracking/subset_sum_problem/index.html
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<p>除此之外，我们还对代码进行了以下两项优化。</p>
<ul>
<li>在开启搜索前，先将数组 <code>nums</code> 排序。在遍历所有选择时，<strong>当子集和超过 <code>target</code> 时直接结束循环</strong>，因为后边的元素更大，其子集和都一定会超过 <code>target</code> 。</li>
<li>省去元素和变量 <code>total</code>，<strong>通过在 <code>target</code> 上执行减法来统计元素和</strong>，当 <code>target</code> 等于 <span class="arithmatex">\(0\)</span> 时记录解。</li>
<li>省去元素和变量 <code>total</code> ，<strong>通过在 <code>target</code> 上执行减法来统计元素和</strong>，当 <code>target</code> 等于 <span class="arithmatex">\(0\)</span> 时记录解。</li>
</ul>
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