leetcode-problemset/leetcode-cn/originData/lexicographically-smallest-string-after-substring-operation.json

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            "categoryTitle": "Algorithms",
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            "title": "Lexicographically Smallest String After Substring Operation",
            "titleSlug": "lexicographically-smallest-string-after-substring-operation",
            "content": "<p>You are given a string <code>s</code> consisting of only lowercase English letters. In one operation, you can do the following:</p>\n\n<ul>\n\t<li>Select any non-empty substring of <code>s</code>, possibly the entire string, then replace each one of its characters with the previous character of the English alphabet. For example, &#39;b&#39; is converted to &#39;a&#39;, and &#39;a&#39; is converted to &#39;z&#39;.</li>\n</ul>\n\n<p>Return <em>the <strong>lexicographically smallest</strong> string you can obtain after performing the above operation <strong>exactly once</strong>.</em></p>\n\n<p>A <strong>substring</strong> is a contiguous sequence of characters in a string.</p>\nA string <code>x</code> is <strong>lexicographically smaller</strong> than a string <code>y</code> of the same length if <code>x[i]</code> comes before <code>y[i]</code> in alphabetic order for the first position <code>i</code> such that <code>x[i] != y[i]</code>.\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;cbabc&quot;\n<strong>Output:</strong> &quot;baabc&quot;\n<strong>Explanation:</strong> We apply the operation on the substring starting at index 0, and ending at index 1 inclusive. \nIt can be proven that the resulting string is the lexicographically smallest. \n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;acbbc&quot;\n<strong>Output:</strong> &quot;abaab&quot;\n<strong>Explanation:</strong> We apply the operation on the substring starting at index 1, and ending at index 4 inclusive. \nIt can be proven that the resulting string is the lexicographically smallest. \n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;leetcode&quot;\n<strong>Output:</strong> &quot;kddsbncd&quot;\n<strong>Explanation:</strong> We apply the operation on the entire string. \nIt can be proven that the resulting string is the lexicographically smallest. \n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 3 * 10<sup>5</sup></code></li>\n\t<li><code>s</code> consists of lowercase English letters</li>\n</ul>\n",
            "translatedTitle": "执行子串操作后的字典序最小字符串",
            "translatedContent": "<p>给你一个仅由小写英文字母组成的字符串 <code>s</code> 。在一步操作中，你可以完成以下行为：</p>\n\n<ul>\n\t<li>选择&nbsp;<code>s</code> 的任一非空子字符串，可能是整个字符串，接着将字符串中的每一个字符替换为英文字母表中的前一个字符。例如，'b' 用 'a' 替换，'a' 用 'z' 替换。</li>\n</ul>\n\n<p>返回执行上述操作 <strong>恰好一次</strong> 后可以获得的 <strong>字典序最小</strong> 的字符串。</p>\n\n<p><strong>子字符串</strong> 是字符串中的一个连续字符序列。</p>\n现有长度相同的两个字符串 <code>x</code> 和 字符串 <code>y</code> ，在满足&nbsp;<code>x[i] != y[i]</code> 的第一个位置 <code>i</code> 上，如果&nbsp; <code>x[i]</code> 在字母表中先于 <code>y[i]</code> 出现，则认为字符串 <code>x</code> 比字符串 <code>y</code> <strong>字典序更小</strong> 。\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"cbabc\"\n<strong>输出：</strong>\"baabc\"\n<strong>解释：</strong>我们选择从下标 0 开始、到下标 1 结束的子字符串执行操作。 \n可以证明最终得到的字符串是字典序最小的。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"acbbc\"\n<strong>输出：</strong>\"abaab\"\n<strong>解释：</strong>我们选择从下标 1 开始、到下标 4 结束的子字符串执行操作。\n可以证明最终得到的字符串是字典序最小的。\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入：</strong>s = \"leetcode\"\n<strong>输出：</strong>\"kddsbncd\"\n<strong>解释：</strong>我们选择整个字符串执行操作。\n可以证明最终得到的字符串是字典序最小的。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 3 * 10<sup>5</sup></code></li>\n\t<li><code>s</code> 仅由小写英文字母组成</li>\n</ul>\n",
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                "When a character is replaced by the one that comes before it on the alphabet, it makes the string lexicographically smaller, except for ‘a'.",
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