public class Student
{
    private String name;

    private String id;

    private int age;

    private int grade;

    private int[] Math;

    private int[] Physics;

    private int[] CS;

    public Student(String name, String id, int age, int grade)
    {
        this.name = name;
        this.id = id;
        this.age = age;
        this.grade = grade;
        this.Math = new int[4];
        this.Physics = new int[4];
        this.CS = new int[4];
    }

    public int getAge()
    {
        return this.age;
    }

    public void setAge(int age)
    {
        this.age = age;
    }

    public int[] getCS()
    {
        return this.CS;
    }

    public void setCS(int grade, int index)
    {
        this.CS[index] = grade;
    }

    public int getGrade()
    {
        return this.grade;
    }

    public void setGrade(int grade)
    {
        this.grade = grade;
    }

    public int[] getMath()
    {
        return this.Math;
    }

    public void setMath(int grade, int index)
    {
        this.Math[index] = grade;
    }

    public int[] getPhysics()
    {
        return this.Physics;
    }

    public void setPhysics(int grade, int index)
    {
        this.Physics[index] = grade;
    }

    public String getId()
    {
        return this.id;
    }

    public String getName()
    {
        return this.name;
    }
    public double getAvg(int[] a)
    {
        double sum = 0;
        for (int i = 0; i < a.length; i++)
        {
            sum += a[i];
        }
        return sum / a.length;

    }
    public double getAllAvg(double avgmath, double avgcs, double avgphy)
    {
        return (avgmath + avgcs + avgphy) * 4 / 3;
    }
    public int getSize()
    {
        return this.CS.length;
    }
}