Leetcode Problem 1763. Longest Nice Substring

1763. Longest Nice Substring

Leetcode Solutions

Divide and Conquer Approach

  1. Define a recursive function longestNiceSubstring that takes a substring of s as input.
  2. Create a set of characters present in the substring.
  3. Iterate over the characters in the substring:
    • If a character does not have its corresponding uppercase or lowercase version in the set, it is a divider.
    • Recursively call longestNiceSubstring on the substrings to the left and right of the divider.
  4. Compare the lengths of the nice substrings obtained from the left and right recursive calls.
  5. Return the longer nice substring, or the left one in case of a tie.
  6. If no divider is found, the entire substring is nice, and we return it.
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Brute Force Approach

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