public class Ifs{
    public static void main(String[] args)
    {
        System.out.println(Ifs.estimateGrade(0, 0));
        System.out.println(Ifs.estimateGrade(1, 0));
        System.out.println(Ifs.estimateGrade(-1, 0));
        System.out.println(Ifs.estimateGrade(0, 10));
        System.out.println(Ifs.estimateGrade(8, 10));
        System.out.println(Ifs.estimateGrade(9, 10));
    }

    static String estimateGrade(int curPts, int maxPoints){
        String grade;

        if (maxPoints != 0){
            int pct = (curPts / maxPoints) * 100;
            System.out.println( pct);

            if (pct > 85.)
            {
                grade = "A";
            } 
            else 
            {
                grade = "B";
            }
        }

        return grade;
    }
}