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public class Virt {
    static int a = 1;

    static abstract class A {
        abstract void foo();
    }

    static class B extends A {
        void foo() {
            a += a / 2;
        }
    }

    static class C extends A {
        void foo() {
            a += 3;
        }
    }

    public static void main(String[]args) {
        bench();
    }

    static void bench() {
        long t = System.currentTimeMillis();
        //A y = new C();
        A x = new B();

        for (int i=0; i<100000000;i++) {
            x.foo();
        }

        System.out.println(a);
        System.out.println(System.currentTimeMillis() - t);
    }

}