plenumKlassA

public class A {
    private int a;

    public A (int a){
        this.a = a;
    }

    public int getA(){
        return this.a ;
    }

    public int add(A a){
        return this.a + a.getA();
    }

    public int m(){
        return 1;
    }

    public int n(){
        return this.m();
    }
}