leetcode-problemset/leetcode-cn/originData/number-of-pairs-of-strings-with-concatenation-equal-to-target.json

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        "question": {
            "questionId": "2133",
            "questionFrontendId": "2023",
            "categoryTitle": "Algorithms",
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            "title": "Number of Pairs of Strings With Concatenation Equal to Target",
            "titleSlug": "number-of-pairs-of-strings-with-concatenation-equal-to-target",
            "content": "<p>Given an array of <strong>digit</strong> strings <code>nums</code> and a <strong>digit</strong> string <code>target</code>, return <em>the number of pairs of indices </em><code>(i, j)</code><em> (where </em><code>i != j</code><em>) such that the <strong>concatenation</strong> of </em><code>nums[i] + nums[j]</code><em> equals </em><code>target</code>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [&quot;777&quot;,&quot;7&quot;,&quot;77&quot;,&quot;77&quot;], target = &quot;7777&quot;\n<strong>Output:</strong> 4\n<strong>Explanation:</strong> Valid pairs are:\n- (0, 1): &quot;777&quot; + &quot;7&quot;\n- (1, 0): &quot;7&quot; + &quot;777&quot;\n- (2, 3): &quot;77&quot; + &quot;77&quot;\n- (3, 2): &quot;77&quot; + &quot;77&quot;\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [&quot;123&quot;,&quot;4&quot;,&quot;12&quot;,&quot;34&quot;], target = &quot;1234&quot;\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> Valid pairs are:\n- (0, 1): &quot;123&quot; + &quot;4&quot;\n- (2, 3): &quot;12&quot; + &quot;34&quot;\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [&quot;1&quot;,&quot;1&quot;,&quot;1&quot;], target = &quot;11&quot;\n<strong>Output:</strong> 6\n<strong>Explanation:</strong> Valid pairs are:\n- (0, 1): &quot;1&quot; + &quot;1&quot;\n- (1, 0): &quot;1&quot; + &quot;1&quot;\n- (0, 2): &quot;1&quot; + &quot;1&quot;\n- (2, 0): &quot;1&quot; + &quot;1&quot;\n- (1, 2): &quot;1&quot; + &quot;1&quot;\n- (2, 1): &quot;1&quot; + &quot;1&quot;\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>2 &lt;= nums.length &lt;= 100</code></li>\n\t<li><code>1 &lt;= nums[i].length &lt;= 100</code></li>\n\t<li><code>2 &lt;= target.length &lt;= 100</code></li>\n\t<li><code>nums[i]</code> and <code>target</code> consist of digits.</li>\n\t<li><code>nums[i]</code> and <code>target</code> do not have leading zeros.</li>\n</ul>\n",
            "translatedTitle": "连接后等于目标字符串的字符串对",
            "translatedContent": "<p>给你一个 <strong>数字</strong>&nbsp;字符串数组 <code>nums</code>&nbsp;和一个 <strong>数字</strong>&nbsp;字符串 <code>target</code>&nbsp;，请你返回 <code>nums[i] + nums[j]</code>&nbsp;（两个字符串连接）结果等于 <code>target</code>&nbsp;的下标 <code>(i, j)</code>&nbsp;（需满足 <code>i != j</code>）的数目。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre><b>输入：</b>nums = [\"777\",\"7\",\"77\",\"77\"], target = \"7777\"\n<b>输出：</b>4\n<b>解释：</b>符合要求的下标对包括：\n- (0, 1)：\"777\" + \"7\"\n- (1, 0)：\"7\" + \"777\"\n- (2, 3)：\"77\" + \"77\"\n- (3, 2)：\"77\" + \"77\"\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre><b>输入：</b>nums = [\"123\",\"4\",\"12\",\"34\"], target = \"1234\"\n<b>输出：</b>2\n<b>解释：</b>符合要求的下标对包括\n- (0, 1)：\"123\" + \"4\"\n- (2, 3)：\"12\" + \"34\"\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre><b>输入：</b>nums = [\"1\",\"1\",\"1\"], target = \"11\"\n<b>输出：</b>6\n<b>解释：</b>符合要求的下标对包括\n- (0, 1)：\"1\" + \"1\"\n- (1, 0)：\"1\" + \"1\"\n- (0, 2)：\"1\" + \"1\"\n- (2, 0)：\"1\" + \"1\"\n- (1, 2)：\"1\" + \"1\"\n- (2, 1)：\"1\" + \"1\"\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>2 &lt;= nums.length &lt;= 100</code></li>\n\t<li><code>1 &lt;= nums[i].length &lt;= 100</code></li>\n\t<li><code>2 &lt;= target.length &lt;= 100</code></li>\n\t<li><code>nums[i]</code>&nbsp;和&nbsp;<code>target</code>&nbsp;只包含数字。</li>\n\t<li><code>nums[i]</code>&nbsp;和&nbsp;<code>target</code>&nbsp;不含有任何前导 0 。</li>\n</ul>\n",
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