feat(hackerrank): add solution for Modified Kaprekar Numbers

src/Problem Solving/Algorithms/Implementation/Modified Kaprekar Numbers/index.ts

@@ -0,0 +1,28 @@
+/**
+ * Prints the modified Kaprekar numbers in the range between (p) and (q), inclusive. If no modified Kaprekar numbers exist in the given range, print "INVALID RANGE".
+ * @author Andrew Mamdouh <[email protected]>
+ * @param {number} p - The range lower limit
+ * @param {number} q - The range upper limit
+ * @returns {string} The list of modified Kaprekar numbers, space-separated on one line and in ascending order or "INVALID RANGE" If no modified Kaprekar numbers exist in the given range.
+ */
+const kaprekarNumbers = (p: number, q: number): string => {
+    const modifiedKaprekarArr: number[] = [];
+    for (let i = p; i <= q; i++) {
+        const poweredStr = Math.pow(i, 2).toString();
+        if (
+            (parseInt(
+                poweredStr.slice(0, poweredStr.length - i.toString().length)
+            ) || 0) +
+                (parseInt(
+                    poweredStr.slice(poweredStr.length - i.toString().length)
+                ) || 0) ===
+            i
+        )
+            modifiedKaprekarArr.push(i);
+    }
+    return modifiedKaprekarArr.length
+        ? modifiedKaprekarArr.join(' ')
+        : 'INVALID RANGE';
+};
+
+export default kaprekarNumbers;

src/Problem Solving/Algorithms/Implementation/index.ts

@@ -35,6 +35,7 @@ import flatlandSpaceStations from '@ProblemSolving/Algorithms/Implementation/Fla
 import fairRations from '@ProblemSolving/Algorithms/Implementation/Fair Rations';
 import cutTheSticks from '@ProblemSolving/Algorithms/Implementation/Cut the sticks';
 import cavityMap from '@ProblemSolving/Algorithms/Implementation/Cavity Map';
+import kaprekarNumbers from '@ProblemSolving/Algorithms/Implementation/Modified Kaprekar Numbers';
 
 export {
     angryProfessor,
@@ -61,6 +62,7 @@ export {
     gradingStudents,
     jumpingOnClouds,
     kangaroo,
+    kaprekarNumbers,
     migratoryBirds,
     minimumDistances,
     pageCount,