How to Solve Longest Ideal Subsequence Problem
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Longest Ideal Subsequence
You are given a string s consisting of lowercase letters and an integer k. We call a string t ideal if the following conditions are satisfied: t is a subsequence of the string s. The absolute differen...
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Understanding the Longest Ideal Subsequence Problem
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Problem Statement
You are given a string s consisting of lowercase letters and an integer k. We call a string t ideal if the following conditions are satisfied: t is a subsequence of the string s. The absolute difference in the alphabet order of every two adjacent letters in t is less than or equal to k. Return the length of the longest ideal string. A subsequence is a string that can be derived from another string by deleting some or no characters without changing the order of the remaining characters. Note that the alphabet order is not cyclic. For example, the absolute difference in the alphabet order of 'a' and 'z' is 25, not 1.
Longest Ideal Subsequence
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Examples
s = "acfgbd", k = 24The longest ideal string is "acbd". The length of this string is 4, so 4 is returned. Note that "acfgbd" is not ideal because 'c' and 'f' have a difference of 3 in alphabet order.
s = "abcd", k = 34The longest ideal string is "abcd". The length of this string is 4, so 4 is returned.
Constraints
1 <= s.length <= 1050 <= k <= 25s consists of lowercase English letters.How Interview Coder Helps with Leetcode Problems
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