import java.math.*;
import java.security.*;

public class BigIntegerTest {
   public static void main (String arg[]) {
      String t = new String("23");
      byte [] numb = t.getBytes();
      System.out.println(new BigInteger(1,numb));
      System.out.println(new BigInteger(-1,numb));
      System.out.println(new BigInteger("23"));
      System.out.println(new BigInteger("-23"));
   }
}