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"translatedContent": "<p>给定一个整数数组和一个整数&nbsp;<code><strong>k</strong></code>,你需要在数组里找到<strong> 不同的&nbsp;</strong>k-diff 数对,并返回不同的 <strong>k-diff 数对</strong> 的数目。</p>\n\n<p>这里将&nbsp;<strong>k-diff</strong>&nbsp;数对定义为一个整数对 <code>(nums[i], nums[j])</code>,并满足下述全部条件:</p>\n\n<ul>\n\t<li><code>0 &lt;= i &lt; j &lt; nums.length</code></li>\n\t<li><code>|nums[i] - nums[j]| == k</code></li>\n</ul>\n\n<p><strong>注意</strong><code>|val|</code> 表示 <code>val</code> 的绝对值。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1</strong></p>\n\n<pre>\n<strong>输入:</strong>nums = [3, 1, 4, 1, 5], k = 2\n<strong>输出:</strong>2\n<strong>解释:</strong>数组中有两个 2-diff 数对, (1, 3) 和 (3, 5)。\n尽管数组中有两个1但我们只应返回不同的数对的数量。\n</pre>\n\n<p><strong>示例 2</strong></p>\n\n<pre>\n<strong>输入:</strong>nums = [1, 2, 3, 4, 5], k = 1\n<strong>输出:</strong>4\n<strong>解释:</strong>数组中有四个 1-diff 数对, (1, 2), (2, 3), (3, 4) 和 (4, 5)。\n</pre>\n\n<p><strong>示例 3</strong></p>\n\n<pre>\n<strong>输入:</strong>nums = [1, 3, 1, 5, 4], k = 0\n<strong>输出:</strong>1\n<strong>解释:</strong>数组中只有一个 0-diff 数对,(1, 1)。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= nums.length &lt;= 10<sup>4</sup></code></li>\n\t<li><code>-10<sup>7</sup> &lt;= nums[i] &lt;= 10<sup>7</sup></code></li>\n\t<li><code>0 &lt;= k &lt;= 10<sup>7</sup></code></li>\n</ul>\n",
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