{ "data": { "question": { "questionId": "395", "questionFrontendId": "395", "boundTopicId": null, "title": "Longest Substring with At Least K Repeating Characters", "titleSlug": "longest-substring-with-at-least-k-repeating-characters", "content": "

Given a string s and an integer k, return the length of the longest substring of s such that the frequency of each character in this substring is greater than or equal to k.

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Example 1:

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\nInput: s = "aaabb", k = 3\nOutput: 3\nExplanation: The longest substring is "aaa", as 'a' is repeated 3 times.\n
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Example 2:

\n\n
\nInput: s = "ababbc", k = 2\nOutput: 5\nExplanation: The longest substring is "ababb", as 'a' is repeated 2 times and 'b' is repeated 3 times.\n
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Constraints:

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