{ "data": { "question": { "questionId": "1567", "questionFrontendId": "1456", "boundTopicId": null, "title": "Maximum Number of Vowels in a Substring of Given Length", "titleSlug": "maximum-number-of-vowels-in-a-substring-of-given-length", "content": "

Given a string s and an integer k, return the maximum number of vowel letters in any substring of s with length k.

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Vowel letters in English are 'a', 'e', 'i', 'o', and 'u'.

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Example 1:

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\nInput: s = "abciiidef", k = 3\nOutput: 3\nExplanation: The substring "iii" contains 3 vowel letters.\n
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Example 2:

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\nInput: s = "aeiou", k = 2\nOutput: 2\nExplanation: Any substring of length 2 contains 2 vowels.\n
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Example 3:

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\nInput: s = "leetcode", k = 3\nOutput: 2\nExplanation: "lee", "eet" and "ode" contain 2 vowels.\n
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Constraints:

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