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

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

|1791|[Find Center of Star Graph](https://leetcode.com/problems/find-center-of-star-graph/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1791.java)||Medium|Graph|

|1790|[Check if One String Swap Can Make Strings Equal](https://leetcode.com/problems/check-if-one-string-swap-can-make-strings-equal/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1790.java)||Easy|String|

|1785|[Minimum Elements to Add to Form a Given Sum](https://leetcode.com/problems/minimum-elements-to-add-to-form-a-given-sum/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1785.java)||Medium|Greedy|

|1784|[Check if Binary String Has at Most One Segment of Ones](https://leetcode.com/problems/check-if-binary-string-has-at-most-one-segment-of-ones/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1784.java)||Easy|Greedy|

|1781|[Sum of Beauty of All Substrings](https://leetcode.com/problems/sum-of-beauty-of-all-substrings/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1781.java)||Medium|HashTable, String|

packagecom.fishercoder.solutions;

publicclass_1790 {

publicstaticclassSolution1 {

publicbooleanareAlmostEqual(Strings1,Strings2) {

if (s1.equals(s2)) {

returntrue;

}

for (inti =0;i <s1.length();i++) {

for (intj =0;j <i;j++) {

StringnewS1 =swap(s1,i,j);

if (newS1.equals(s2)) {

returntrue;

}

}

}

returnfalse;

}

privateStringswap(Stringstr,inti,intj) {

charc =str.charAt(i);

StringBuildersb =newStringBuilder(str);

sb.replace(i,i +1,str.charAt(j) +"");

sb.replace(j,j +1,"" +c);

returnsb.toString();

}

}

}

packagecom.fishercoder;

importcom.fishercoder.solutions._1790;

importorg.junit.BeforeClass;

importorg.junit.Test;

importstaticorg.junit.Assert.assertEquals;

publicclass_1790Test {

privatestatic_1790.Solution1solution1;

publicstaticvoidsetup() {

solution1 =new_1790.Solution1();

}

publicvoidtest1() {

assertEquals(false,solution1.areAlmostEqual("a","z"));

}

publicvoidtest2() {

assertEquals(true,solution1.areAlmostEqual("bank","kanb"));

}

}