leetcode-problemset/leetcode-cn/originData/decoded-string-at-index.json

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            "title": "Decoded String at Index",
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            "content": "<p>You are given an encoded string <code>s</code>. To decode the string to a tape, the encoded string is read one character at a time and the following steps are taken:</p>\n\n<ul>\n\t<li>If the character read is a letter, that letter is written onto the tape.</li>\n\t<li>If the character read is a digit <code>d</code>, the entire current tape is repeatedly written <code>d - 1</code> more times in total.</li>\n</ul>\n\n<p>Given an integer <code>k</code>, return <em>the </em><code>k<sup>th</sup></code><em> letter (<strong>1-indexed)</strong> in the decoded string</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;leet2code3&quot;, k = 10\n<strong>Output:</strong> &quot;o&quot;\n<strong>Explanation:</strong> The decoded string is &quot;leetleetcodeleetleetcodeleetleetcode&quot;.\nThe 10<sup>th</sup> letter in the string is &quot;o&quot;.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;ha22&quot;, k = 5\n<strong>Output:</strong> &quot;h&quot;\n<strong>Explanation:</strong> The decoded string is &quot;hahahaha&quot;.\nThe 5<sup>th</sup> letter is &quot;h&quot;.\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;a2345678999999999999999&quot;, k = 1\n<strong>Output:</strong> &quot;a&quot;\n<strong>Explanation:</strong> The decoded string is &quot;a&quot; repeated 8301530446056247680 times.\nThe 1<sup>st</sup> letter is &quot;a&quot;.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>2 &lt;= s.length &lt;= 100</code></li>\n\t<li><code>s</code> consists of lowercase English letters and digits <code>2</code> through <code>9</code>.</li>\n\t<li><code>s</code> starts with a letter.</li>\n\t<li><code>1 &lt;= k &lt;= 10<sup>9</sup></code></li>\n\t<li>It is guaranteed that <code>k</code> is less than or equal to the length of the decoded string.</li>\n\t<li>The decoded string is guaranteed to have less than <code>2<sup>63</sup></code> letters.</li>\n</ul>\n",
            "translatedTitle": "索引处的解码字符串",
            "translatedContent": "<p>给定一个编码字符串 <code>S</code>。请你找出<em> </em><strong>解码字符串</strong> 并将其写入磁带。解码时，从编码字符串中<strong> 每次读取一个字符 </strong>，并采取以下步骤：</p>\n\n<ul>\n\t<li>如果所读的字符是字母，则将该字母写在磁带上。</li>\n\t<li>如果所读的字符是数字（例如 <code>d</code>），则整个当前磁带总共会被重复写&nbsp;<code>d-1</code> 次。</li>\n</ul>\n\n<p>现在，对于给定的编码字符串 <code>S</code> 和索引 <code>K</code>，查找并返回解码字符串中的第&nbsp;<code>K</code>&nbsp;个字母。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre><strong>输入：</strong>S = &quot;leet2code3&quot;, K = 10\n<strong>输出：</strong>&quot;o&quot;\n<strong>解释：</strong>\n解码后的字符串为 &quot;leetleetcodeleetleetcodeleetleetcode&quot;。\n字符串中的第 10 个字母是 &quot;o&quot;。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre><strong>输入：</strong>S = &quot;ha22&quot;, K = 5\n<strong>输出：</strong>&quot;h&quot;\n<strong>解释：</strong>\n解码后的字符串为 &quot;hahahaha&quot;。第 5 个字母是 &quot;h&quot;。\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre><strong>输入：</strong>S = &quot;a2345678999999999999999&quot;, K = 1\n<strong>输出：</strong>&quot;a&quot;\n<strong>解释：</strong>\n解码后的字符串为 &quot;a&quot; 重复 8301530446056247680 次。第 1 个字母是 &quot;a&quot;。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>2 &lt;= S.length &lt;= 100</code></li>\n\t<li><code>S</code>&nbsp;只包含小写字母与数字 <code>2</code> 到 <code>9</code> 。</li>\n\t<li><code>S</code>&nbsp;以字母开头。</li>\n\t<li><code>1 &lt;= K &lt;= 10^9</code></li>\n\t<li>题目保证 <code>K</code> 小于或等于解码字符串的长度。</li>\n\t<li>解码后的字符串保证少于&nbsp;<code>2^63</code>&nbsp;个字母。</li>\n</ul>\n",
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