Solution: Count Substrings With K-Frequency Characters II
Explore the sliding window technique to count substrings where at least one character appears k times. Understand how to maintain character frequencies and adjust window boundaries to efficiently compute the total valid substrings in linear time.
We'll cover the following...
We'll cover the following...
Statement
Given a string s and an integer k, return the total number of substrings of s where at least one character appears at least k times.
Note: A substring is a contiguous sequence of characters within a string. For example, "edu" is a substring of "educative".
Constraints:
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