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<p>给定两个数组 <code>nums1</code> 和 <code>nums2</code> ,返回 <em>它们的交集</em> 。输出结果中的每个元素一定是 <strong>唯一</strong> 的。我们可以 <strong>不考虑输出结果的顺序</strong> 。</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>nums1 = [1,2,2,1], nums2 = [2,2]
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<strong>输出:</strong>[2]
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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>nums1 = [4,9,5], nums2 = [9,4,9,8,4]
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<strong>输出:</strong>[9,4]
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<strong>解释:</strong>[4,9] 也是可通过的
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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 <= nums1.length, nums2.length <= 1000</code></li>
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	<li><code>0 <= nums1[i], nums2[i] <= 1000</code></li>
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</ul>
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