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Given a string S, return the sum of beauty of all its substrings. The beauty of a string is defined as the difference in frequencies ...

Given a string s, return the longest palindromic substring in s. Example 1: Input: s = "babad" Output: "bab" Explanation: "aba" is ...

If you are preparing for coding interviews, you cannot skip the Sliding Window technique. It appears in almost every DSA round!

Analyze strings or arrays consisting of ones and zeroes using counting and greedy logic. A classic binary string problem focusing ...