{ "data": { "question": { "questionId": "3871", "questionFrontendId": "3545", "categoryTitle": "Algorithms", "boundTopicId": 3673022, "title": "Minimum Deletions for At Most K Distinct Characters", "titleSlug": "minimum-deletions-for-at-most-k-distinct-characters", "content": "

You are given a string s consisting of lowercase English letters, and an integer k.

\n\n

Your task is to delete some (possibly none) of the characters in the string so that the number of distinct characters in the resulting string is at most k.

\n\n

Return the minimum number of deletions required to achieve this.

\n\n

 

\n

Example 1:

\n\n
\n

Input: s = "abc", k = 2

\n\n

Output: 1

\n\n

Explanation:

\n\n\n
\n\n

Example 2:

\n\n
\n

Input: s = "aabb", k = 2

\n\n

Output: 0

\n\n

Explanation:

\n\n\n
\n\n

Example 3:

\n\n
\n

Input: s = "yyyzz", k = 1

\n\n

Output: 2

\n\n

Explanation:

\n\n\n
\n\n

 

\n

Constraints:

\n\n\n\n

\n", "translatedTitle": "不同字符数量最多为 K 时的最少删除数", "translatedContent": "

给你一个字符串 s（由小写英文字母组成）和一个整数 k。

\n\n

你的任务是删除字符串中的一些字符（可以不删除任何字符），使得结果字符串中的 不同字符数量 最多为 k。

\n\n

返回为达到上述目标所需删除的 最小 字符数量。

\n\n

 

\n\n

示例 1：

\n\n
\n

输入： s = \"abc\", k = 2

\n\n

输出： 1

\n\n

解释：

\n\n\n
\n\n

示例 2：

\n\n
\n

输入： s = \"aabb\", k = 2

\n\n

输出： 0

\n\n

解释：

\n\n\n
\n\n

示例 3：

\n\n
\n

输入： s = \"yyyzz\", k = 1

\n\n

输出： 2

\n\n

解释：

\n\n\n
\n\n

 

\n\n

提示：

\n\n\n\n

 

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If d <= 0, return 0.", "Otherwise, the minimum deletions is the sum of the first d entries in counts (removing the d least-frequent characters)." ], "solution": null, "status": null, "sampleTestCase": "\"abc\"\n2", "metaData": "{\n \"name\": \"minDeletion\",\n \"params\": [\n {\n \"name\": \"s\",\n \"type\": \"string\"\n },\n {\n \"type\": \"integer\",\n \"name\": \"k\"\n }\n ],\n \"return\": {\n \"type\": \"integer\"\n }\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "envInfo": "{\"cpp\":[\"C++\",\"

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