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"translatedContent": "<p>给你一个由 <strong>不同</strong> 整数组成的数组 <code>nums</code> ,和一个目标整数 <code>target</code> 。请你从 <code>nums</code> 中找出并返回总和为 <code>target</code> 的元素组合的个数。</p>\n\n<p>题目数据保证答案符合 32 位整数范围。</p>\n\n<p> </p>\n\n<p><strong>示例 1</strong></p>\n\n<pre>\n<strong>输入:</strong>nums = [1,2,3], target = 4\n<strong>输出:</strong>7\n<strong>解释:</strong>\n所有可能的组合为\n(1, 1, 1, 1)\n(1, 1, 2)\n(1, 2, 1)\n(1, 3)\n(2, 1, 1)\n(2, 2)\n(3, 1)\n请注意顺序不同的序列被视作不同的组合。\n</pre>\n\n<p><strong>示例 2</strong></p>\n\n<pre>\n<strong>输入:</strong>nums = [9], target = 3\n<strong>输出:</strong>0\n</pre>\n\n<p> </p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 <= nums.length <= 200</code></li>\n\t<li><code>1 <= nums[i] <= 1000</code></li>\n\t<li><code>nums</code> 中的所有元素 <strong>互不相同</strong></li>\n\t<li><code>1 <= target <= 1000</code></li>\n</ul>\n\n<p> </p>\n\n<p><strong>进阶:</strong>如果给定的数组中含有负数会发生什么?问题会产生何种变化?如果允许负数出现,需要向题目中添加哪些限制条件?</p>\n",
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