import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        Object[] os = { null, true, false };
        for (Object o : os) {
            boolean b = o != null && (boolean) o;
            System.out.println(b);
        }
    }
}