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

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

|1657|[Determine if Two Strings Are Close](https://leetcode.com/problems/determine-if-two-strings-are-close/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1657.java)||Medium|Greedy|

|1656|[Design an Ordered Stream](https://leetcode.com/problems/design-an-ordered-stream/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1656.java)||Easy|Array, Design|

|1652|[Defuse the Bomb](https://leetcode.com/problems/defuse-the-bomb/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1652.java)||Easy|Array|

|1640|[Check Array Formation Through Concatenation](https://leetcode.com/problems/check-array-formation-through-concatenation/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1640.java)||Easy|Array, Sort|

packagecom.fishercoder.solutions;

importjava.util.Arrays;

importjava.util.HashSet;

importjava.util.Set;

publicclass_1657 {

publicstaticclassSolution1 {

publicbooleancloseStrings(Stringword1,Stringword2) {

int[]counts1 =newint[26];

int[]counts2 =newint[26];

Set<Character>set1 =newHashSet<>();

Set<Character>set2 =newHashSet<>();

for (charc :word1.toCharArray()) {

counts1[c -'a']++;

set1.add(c);

}

Arrays.sort(counts1);

for (charc :word2.toCharArray()) {

counts2[c -'a']++;

set2.add(c);

}

Arrays.sort(counts2);

returnset1.equals(set2) &&Arrays.equals(counts1,counts2);

}

}

}

packagecom.fishercoder;

importcom.fishercoder.solutions._1657;

importorg.junit.BeforeClass;

importorg.junit.Test;

importstaticorg.junit.Assert.assertEquals;

publicclass_1657Test {

privatestatic_1657.Solution1solution1;

publicstaticvoidsetup() {

solution1 =new_1657.Solution1();

}

publicvoidtest1() {

assertEquals(true,solution1.closeStrings("abc","bca"));

}

publicvoidtest2() {

assertEquals(false,solution1.closeStrings("a","aa"));

}

publicvoidtest3() {

assertEquals(true,solution1.closeStrings("cabbba","abbccc"));

}

publicvoidtest4() {

assertEquals(false,solution1.closeStrings("cabbba","aabbss"));

}

publicvoidtest5() {

assertEquals(false,solution1.closeStrings("abbbzcf","babzzcz"));

}

}