@@ -0,0 +1,543 @@
+package java_problems.object_oriented_programming;%0D%0A%0D%0Aclass MyCalculator implements AdvancedArithmetic %7B%0D%0A    %0D%0A    public int divisorSum(int n) %7B%0D%0A        %0D%0A        int sum = 0;%0D%0A        %0D%0A        if (n == 1) %7B%0D%0A            return 1;%0D%0A        %7D else %7B%0D%0A            for (int i = 2; i %3C n; i++) %7B%0D%0A                if (n %25 i == 0) %7B%0D%0A                    sum += i;%0D%0A                %7D%0D%0A            %7D%0D%0A        %7D%0D%0A        sum += (1 + n);%0D%0A        return sum;%0D%0A    %7D%0D%0A%7D%0D%0A%0D%0Ainterface AdvancedArithmetic %7B%0D%0A%09%0D%0A%09public abstract int divisorSum(int n);%0D%0A%7D

Add Java Inheritance problem MyCalculator