/*
    @author: Roderland
    @create: 2020-07-30---21:50
*/
public class Main {
    public static void main(String[] args) {
        System.out.println(Integer.MIN_VALUE>>>1);
//        Integer a= 1456;
//        Integer b= 1456;
//        System.out.println(a==b);
        A a = new B();
        a.f();
    }

    public static int highestOneBit(int i) {
        i |= (i>>1);
        i |= (i>>2);
        i |= (i>>4);
        i |= (i>>8);
        i |= (i>>16);
        return i - (i >>> 1);
    }
}

class A {
    void f() {
        System.out.println("A");
    }
}

class B extends A {
    void f() {
        System.out.println("B");
    }
}

class MySet {
    byte[] row;
    byte[] column;
    public static final int N = 1250;

    public MySet() {
        row = new byte[N];
        column = new byte[N];
    }
}