Leetcode Problem 2309. Greatest English Letter in Upper and Lower Case

2309. Greatest English Letter in Upper and Lower Case

Leetcode Solutions

Initialize two empty sets: lowercase_letters and uppercase_letters.
Iterate over each character ch in the string s:
- If ch is a lowercase letter, add it to lowercase_letters.
- If ch is an uppercase letter, add it to uppercase_letters.
Iterate over the uppercase English alphabet in reverse order (from 'Z' to 'A'):
- Check if the current uppercase letter and its corresponding lowercase letter are present in their respective sets.
- If both are present, return the current uppercase letter as the result.
If no letter is found that meets the criteria, return an empty string.

Programming Language

Purpose:

General Question

Debug My Code

image/screenshot of info(optional)

Full Screen