Package g2301_2400.s2309_greatest_english_letter_in_upper_and_lower_case

Class Solution

java.lang.Object

g2301_2400.s2309_greatest_english_letter_in_upper_and_lower_case.Solution

public class Solution
extends Object

2309 - Greatest English Letter in Upper and Lower Case\. Easy Given a string of English letters `s`, return _the **greatest** English letter which occurs as **both** a lowercase and uppercase letter in_ `s`. The returned letter should be in **uppercase**. If no such letter exists, return _an empty string_. An English letter `b` is **greater** than another letter `a` if `b` appears **after** `a` in the English alphabet. **Example 1:** **Input:** s = "l**Ee**TcOd**E**" **Output:** "E" **Explanation:** The letter 'E' is the only letter to appear in both lower and upper case. **Example 2:** **Input:** s = "a**rR**AzFif" **Output:** "R" **Explanation:** The letter 'R' is the greatest letter to appear in both lower and upper case. Note that 'A' and 'F' also appear in both lower and upper case, but 'R' is greater than 'F' or 'A'. **Example 3:** **Input:** s = "AbCdEfGhIjK" **Output:** "" **Explanation:** There is no letter that appears in both lower and upper case. **Constraints:** * `1 <= s.length <= 1000` * `s` consists of lowercase and uppercase English letters.

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
String	greatestLetter(String s)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

greatestLetter

public String greatestLetter(String s)