Hackerrank-Grading Students in kotlin

problem
HackerLand University has the following grading policy:

• Every student receives a grade in the inclusive range from 0 to 100 .
• Any grade less than 40 is a failing grade.

Sam is a professor at the university and likes to round each student’s grade according to these rules:

• If the difference between the grade and the next multiple of 5 is less than 3, round grade up to the next multiple of 5.
• If the value of grade is less than 38, no rounding occurs as the result will still be a failing grade.

Examples

• grade = 84 round to 85 (85–84 is less than 3)
• grade = 29 do not round (result is less than 40)
• grade = 57 do not round (60–57 is 3 or higher)

Given the initial value of grade for each of Sam’s n students, write code to automate the rounding process.

Function Description

Complete the function gradingStudents in the editor below.
gradingStudents has the following parameter(s):

• int grades[n]: the grades before rounding

Returns

• int[n]: the grades after rounding as appropriate

Input Format
The first line contains a single integer, n, the number of students. Each line of i the n subsequent lines contains a single integer, grade[i].

Sample Input

4 
73 
67 
38 
33

Sample Output

75 
67 
40 
33

Answer :

  fun gradingStudents(grades: Array<Int>): Array<Int> {

        var listOfGrade: MutableList<Int> = ArrayList()

        for (grade in grades) {

            if (grade >= 38 && (grade % 5) > 2) {
                var number = grade + (5 - (grade % 5))
                listOfNumber.add(number)
            } else {
                listOfNumber.add(grade)
            }
        }

        return listOfGrade.toTypedArray()
  }