| # | Title | Solutions | Video | Difficulty | Tag

|------|----------------|------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------|-------------|-------------

| 2309|[Greatest English Letter in Upper and Lower Case](https://leetcode.com/problems/greatest-english-letter-in-upper-and-lower-case/)|[Java](../master/src/main/java/com/fishercoder/solutions/_2309.java)|| Easy||

| 2299|[Strong Password Checker II](https://leetcode.com/problems/strong-password-checker-ii/)|[Java](../master/src/main/java/com/fishercoder/solutions/_2299.java)|| Easy||

| 2288|[Apply Discount to Prices](https://leetcode.com/problems/apply-discount-to-prices/)|[Java](../master/src/main/java/com/fishercoder/solutions/_2288.java)|| Medium||

| 2287|[Rearrange Characters to Make Target String](https://leetcode.com/problems/rearrange-characters-to-make-target-string/)|[Java](../master/src/main/java/com/fishercoder/solutions/_2288.java)|| Easy||

packagecom.fishercoder.solutions;

importjava.util.ArrayList;

importjava.util.Collections;

importjava.util.List;

publicclass_2309 {

publicstaticclassSolution1 {

publicStringgreatestLetter(Strings) {

List<Character>lowercase =newArrayList<>();

List<Character>uppercase =newArrayList<>();

for (charc :s.toCharArray()) {

if (Character.isLowerCase(c)) {

lowercase.add(c);

}else {

uppercase.add(c);

}

}

Collections.sort(uppercase,Collections.reverseOrder());

Collections.sort(lowercase,Collections.reverseOrder());

for (inti =0;i <uppercase.size();i++) {

for (intj =0;j <lowercase.size();j++) {

if (Character.toLowerCase(uppercase.get(i)) ==lowercase.get(j)) {

returnuppercase.get(i) +"";

}

}

}

return"";

}

}

}

packagecom.fishercoder;

importcom.fishercoder.solutions._2309;

importorg.junit.BeforeClass;

importorg.junit.Test;

importstaticorg.junit.Assert.assertEquals;

publicclass_2309Test {

privatestatic_2309.Solution1solution1;

publicstaticvoidsetup() {

solution1 =new_2309.Solution1();

}

publicvoidtest1() {

assertEquals("E",solution1.greatestLetter("lEeTcOdE"));

}

publicvoidtest2() {

assertEquals("R",solution1.greatestLetter("arRAzFif"));

}

}