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57 lines
1.9 KiB
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<p>给定一个<strong>无重复元素</strong>的正整数数组 <code>candidates</code> 和一个正整数 <code>target</code> ，找出 <code>candidates</code> 中所有可以使数字和为目标数 <code>target</code> 的唯一组合。</p>
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<p><code>candidates</code> 中的数字可以无限制重复被选取。如果至少一个所选数字数量不同，则两种组合是不同的。 </p>
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<p>对于给定的输入，保证和为 <code>target</code> 的唯一组合数少于 <code>150</code> 个。</p>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre>
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<strong>输入: </strong>candidates = <code>[2,3,6,7], </code>target = <code>7</code>
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<strong>输出: </strong>[[7],[2,2,3]]
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</pre>
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<p><strong>示例 2：</strong></p>
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<pre>
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<strong>输入: </strong>candidates = [2,3,5]<code>, </code>target = 8
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<strong>输出: </strong>[[2,2,2,2],[2,3,3],[3,5]]</pre>
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<p><strong>示例 3：</strong></p>
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<pre>
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<strong>输入: </strong>candidates = <code>[2], </code>target = <span style="white-space: pre-wrap;">1</span>
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<strong>输出: </strong>[]
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</pre>
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<p><strong>示例 4：</strong></p>
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<pre>
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<strong>输入: </strong>candidates = <code>[1], </code>target = <code>1</code>
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<strong>输出: </strong>[[1]]
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</pre>
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<p><strong>示例 5：</strong></p>
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<pre>
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<strong>输入: </strong>candidates = <code>[1], </code>target = <code>2</code>
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<strong>输出: </strong>[[1,1]]
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</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>1 <= candidates.length <= 30</code></li>
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<li><code>1 <= candidates[i] <= 200</code></li>
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<li><code>candidate</code> 中的每个元素都是独一无二的。</li>
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<li><code>1 <= target <= 500</code></li>
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</ul>
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<p> </p>
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<p><meta charset="UTF-8" />注意：本题与主站 39 题相同： <a href="https://leetcode-cn.com/problems/combination-sum/">https://leetcode-cn.com/problems/combination-sum/</a></p>
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