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            "questionId": "2422",
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            "categoryTitle": "Algorithms",
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            "title": "Query Kth Smallest Trimmed Number",
            "titleSlug": "query-kth-smallest-trimmed-number",
            "content": "<p>You are given a <strong>0-indexed</strong> array of strings <code>nums</code>, where each string is of <strong>equal length</strong> and consists of only digits.</p>\n\n<p>You are also given a <strong>0-indexed</strong> 2D integer array <code>queries</code> where <code>queries[i] = [k<sub>i</sub>, trim<sub>i</sub>]</code>. For each <code>queries[i]</code>, you need to:</p>\n\n<ul>\n\t<li><strong>Trim</strong> each number in <code>nums</code> to its <strong>rightmost</strong> <code>trim<sub>i</sub></code> digits.</li>\n\t<li>Determine the <strong>index</strong> of the <code>k<sub>i</sub><sup>th</sup></code> smallest trimmed number in <code>nums</code>. If two trimmed numbers are equal, the number with the <strong>lower</strong> index is considered to be smaller.</li>\n\t<li>Reset each number in <code>nums</code> to its original length.</li>\n</ul>\n\n<p>Return <em>an array </em><code>answer</code><em> of the same length as </em><code>queries</code>,<em> where </em><code>answer[i]</code><em> is the answer to the </em><code>i<sup>th</sup></code><em> query.</em></p>\n\n<p><strong>Note</strong>:</p>\n\n<ul>\n\t<li>To trim to the rightmost <code>x</code> digits means to keep removing the leftmost digit, until only <code>x</code> digits remain.</li>\n\t<li>Strings in <code>nums</code> may contain leading zeros.</li>\n</ul>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [&quot;102&quot;,&quot;473&quot;,&quot;251&quot;,&quot;814&quot;], queries = [[1,1],[2,3],[4,2],[1,2]]\n<strong>Output:</strong> [2,2,1,0]\n<strong>Explanation:</strong>\n1. After trimming to the last digit, nums = [&quot;2&quot;,&quot;3&quot;,&quot;1&quot;,&quot;4&quot;]. The smallest number is 1 at index 2.\n2. Trimmed to the last 3 digits, nums is unchanged. The 2<sup>nd</sup> smallest number is 251 at index 2.\n3. Trimmed to the last 2 digits, nums = [&quot;02&quot;,&quot;73&quot;,&quot;51&quot;,&quot;14&quot;]. The 4<sup>th</sup> smallest number is 73.\n4. Trimmed to the last 2 digits, the smallest number is 2 at index 0.\n   Note that the trimmed number &quot;02&quot; is evaluated as 2.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [&quot;24&quot;,&quot;37&quot;,&quot;96&quot;,&quot;04&quot;], queries = [[2,1],[2,2]]\n<strong>Output:</strong> [3,0]\n<strong>Explanation:</strong>\n1. Trimmed to the last digit, nums = [&quot;4&quot;,&quot;7&quot;,&quot;6&quot;,&quot;4&quot;]. The 2<sup>nd</sup> smallest number is 4 at index 3.\n   There are two occurrences of 4, but the one at index 0 is considered smaller than the one at index 3.\n2. Trimmed to the last 2 digits, nums is unchanged. The 2<sup>nd</sup> smallest number is 24.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= nums.length &lt;= 100</code></li>\n\t<li><code>1 &lt;= nums[i].length &lt;= 100</code></li>\n\t<li><code>nums[i]</code> consists of only digits.</li>\n\t<li>All <code>nums[i].length</code> are <strong>equal</strong>.</li>\n\t<li><code>1 &lt;= queries.length &lt;= 100</code></li>\n\t<li><code>queries[i].length == 2</code></li>\n\t<li><code>1 &lt;= k<sub>i</sub> &lt;= nums.length</code></li>\n\t<li><code>1 &lt;= trim<sub>i</sub> &lt;= nums[i].length</code></li>\n</ul>\n\n<p>&nbsp;</p>\n<p><strong>Follow up:</strong> Could you use the <strong>Radix Sort Algorithm</strong> to solve this problem? What will be the complexity of that solution?</p>\n",
            "translatedTitle": "裁剪数字后查询第 K 小的数字",
            "translatedContent": "<p>给你一个下标从 <strong>0</strong>&nbsp;开始的字符串数组&nbsp;<code>nums</code>&nbsp;，其中每个字符串 <strong>长度相等</strong>&nbsp;且只包含数字。</p>\n\n<p>再给你一个下标从 <strong>0</strong>&nbsp;开始的二维整数数组&nbsp;<code>queries</code>&nbsp;，其中&nbsp;<code>queries[i] = [k<sub>i</sub>, trim<sub>i</sub>]</code>&nbsp;。对于每个&nbsp;<code>queries[i]</code>&nbsp;，你需要：</p>\n\n<ul>\n\t<li>将&nbsp;<code>nums</code>&nbsp;中每个数字 <strong>裁剪</strong>&nbsp;到剩下 <strong>最右边</strong>&nbsp;<code>trim<sub>i</sub></code>&nbsp;个数位。</li>\n\t<li>在裁剪过后的数字中，找到 <code>nums</code>&nbsp;中第&nbsp;<code>k<sub>i</sub></code>&nbsp;小数字对应的 <strong>下标</strong>&nbsp;。如果两个裁剪后数字一样大，那么下标 <strong>更小</strong>&nbsp;的数字视为更小的数字。</li>\n\t<li>将 <code>nums</code>&nbsp;中每个数字恢复到原本字符串。</li>\n</ul>\n\n<p>请你返回一个长度与 <code><span style=\"\">queries</span></code>&nbsp;相等的数组<em>&nbsp;</em><code>answer</code>，其中<em>&nbsp;</em><code>answer[i]</code>是第<em>&nbsp;</em><code>i</code><em>&nbsp;</em>次查询的结果。</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li>裁剪到剩下最右边 <code>x</code>&nbsp;个数位的意思是不断删除最左边的数位，直到剩下 <code>x</code>&nbsp;个数位。</li>\n\t<li><code>nums</code>&nbsp;中的字符串可能会有前导 0 。</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<b>输入：</b>nums = [\"102\",\"473\",\"251\",\"814\"], queries = [[1,1],[2,3],[4,2],[1,2]]\n<b>输出：</b>[2,2,1,0]\n<strong>解释：</strong>\n1. 裁剪到只剩 1 个数位后，nums = [\"2\",\"3\",\"1\",\"4\"] 。最小的数字是 1 ，下标为 2 。\n2. 裁剪到剩 3 个数位后，nums 没有变化。第 2 小的数字是 251 ，下标为 2 。\n3. 裁剪到剩 2 个数位后，nums = [\"02\",\"73\",\"51\",\"14\"] 。第 4 小的数字是 73 ，下标为 1 。\n4. 裁剪到剩 2 个数位后，最小数字是 2 ，下标为 0 。\n   注意，裁剪后数字 \"02\" 值为 2 。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<b>输入：</b>nums = [\"24\",\"37\",\"96\",\"04\"], queries = [[2,1],[2,2]]\n<b>输出：</b>[3,0]\n<strong>解释：</strong>\n1. 裁剪到剩 1 个数位，nums = [\"4\",\"7\",\"6\",\"4\"] 。第 2 小的数字是 4 ，下标为 3 。\n   有两个 4 ，下标为 0 的 4 视为小于下标为 3 的 4 。\n2. 裁剪到剩 2 个数位，nums 不变。第二小的数字是 24 ，下标为 0 。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><b>提示：</b></p>\n\n<ul>\n\t<li><code>1 &lt;= nums.length &lt;= 100</code></li>\n\t<li><code>1 &lt;= nums[i].length &lt;= 100</code></li>\n\t<li><code>nums[i]</code> 只包含数字。</li>\n\t<li>所有&nbsp;<code>nums[i].length</code>&nbsp;的长度 <b>相同</b>&nbsp;。</li>\n\t<li><code>1 &lt;= queries.length &lt;= 100</code></li>\n\t<li><code>queries[i].length == 2</code></li>\n\t<li><code>1 &lt;= k<sub>i</sub> &lt;= nums.length</code></li>\n\t<li><code>1 &lt;= trim<sub>i</sub> &lt;= nums[0].length</code></li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><strong>进阶：</strong>你能使用 <strong>基数排序算法</strong> 解决此问题吗？这种解法的复杂度又是多少？</p>\n",
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