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

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

|1592|[Rearrange Spaces Between Words](https://leetcode.com/problems/rearrange-spaces-between-words/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1592.java)||String|Easy|

|1583|[Count Unhappy Friends](https://leetcode.com/problems/count-unhappy-friends/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1583.java)||Array|Medium|

|1582|[Special Positions in a Binary Matrix](https://leetcode.com/problems/special-positions-in-a-binary-matrix/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1582.java)||Array|Easy|

|1576|[Replace All ?'s to Avoid Consecutive Repeating Characters](https://leetcode.com/problems/replace-all-s-to-avoid-consecutive-repeating-characters/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1576.java)|[:tv:](https://youtu.be/SJBDLYqrIsM)|String|Easy|

packagecom.fishercoder.solutions;

publicclass_1592 {

publicstaticclassSolution1 {

publicStringreorderSpaces(Stringtext) {

intspaceCount =0;

for (charc :text.toCharArray()) {

if (c ==' ') {

spaceCount++;

}

}

String[]words =text.trim().split("\\s+");

if (words.length ==1) {

StringBuildersb =newStringBuilder(words[0]);

for (inti =0;i <spaceCount;i++) {

sb.append(" ");

}

returnsb.toString();

}

inttrailingSpaces =spaceCount % (words.length -1);

intnewSpaces =spaceCount / (words.length -1);

StringBuildersb =newStringBuilder();

for (intj =0;j <words.length;j++) {

sb.append(words[j]);

if (j <words.length -1) {

for (inti =0;i <newSpaces;i++) {

sb.append(" ");

}

}else {

for (inti =0;i <trailingSpaces;i++) {

sb.append(" ");

}

}

}

returnsb.toString();

}

}

}

packagecom.fishercoder;

importcom.fishercoder.solutions._1592;

importorg.junit.BeforeClass;

importorg.junit.Test;

importstaticorg.junit.Assert.assertEquals;

publicclass_1592Test {

privatestatic_1592.Solution1solution1;

publicstaticvoidsetup() {

solution1 =new_1592.Solution1();

}

publicvoidtest1() {

assertEquals("hello ",solution1.reorderSpaces(" hello"));

}

publicvoidtest2() {

assertEquals("this is a sentence",solution1.reorderSpaces(" this is a sentence "));

}

publicvoidtest3() {

assertEquals("practice makes perfect ",solution1.reorderSpaces(" practice makes perfect"));

}

publicvoidtest4() {

assertEquals("hello world",solution1.reorderSpaces("hello world"));

}

publicvoidtest5() {

assertEquals("walks udp package into bar a ",solution1.reorderSpaces(" walks udp package into bar a"));

}

publicvoidtest6() {

assertEquals("a",solution1.reorderSpaces("a"));

}

}