{ "data": { "question": { "questionId": "2395", "questionFrontendId": "2311", "boundTopicId": null, "title": "Longest Binary Subsequence Less Than or Equal to K", "titleSlug": "longest-binary-subsequence-less-than-or-equal-to-k", "content": "

You are given a binary string s and a positive integer k.

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Return the length of the longest subsequence of s that makes up a binary number less than or equal to k.

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Note:

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Example 1:

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\nInput: s = "1001010", k = 5\nOutput: 5\nExplanation: The longest subsequence of s that makes up a binary number less than or equal to 5 is "00010", as this number is equal to 2 in decimal.\nNote that "00100" and "00101" are also possible, which are equal to 4 and 5 in decimal, respectively.\nThe length of this subsequence is 5, so 5 is returned.\n
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Example 2:

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\nInput: s = "00101001", k = 1\nOutput: 6\nExplanation: "000001" is the longest subsequence of s that makes up a binary number less than or equal to 1, as this number is equal to 1 in decimal.\nThe length of this subsequence is 6, so 6 is returned.\n
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Constraints:

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