HackerRank Solutions Grading Students Problem [SOLVED]

It is as simple as HELL!!

https://www.hackerrank.com/challenges/grading/problem

SO EASY!!

    public static List<int> gradingStudents(List<int> grades)
    {
         for (int i = 0; i < grades.Count; i++)
        {
            var item = grades[i];
            if (item >= 38)
            {
                var diff = 5 - (item % 5);
                if (diff < 3)
                    grades[i] = item + diff;
            }
        }
      return grades;
    }