Leetcode Problem 2014. Longest Subsequence Repeated k Times
2014. Longest Subsequence Repeated k Times
AI Mock Interview
Leetcode Solutions
Generating and Checking Subsequences
Solution Idea
Algorithm Steps
Code Implementation
Complexity Analysis
Count the frequency of each character in
s
and identify the 'hot' characters that appear at least
k
times.
Generate all possible subsequences using the 'hot' characters, up to 7 characters long.
Sort the subsequences by length and lexicographical order, in descending order.
Iterate over the sorted subsequences and check if each one is a subsequence of
s
repeated
k
times.
Return the first subsequence that meets the criteria, or an empty string if none do.
Recursive Subsequence Generation and Checking
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