package g_news;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class WelcomeToGnews{
	private static final int ERR_RESULT = -1;
	private static final int NML_RESULT = 0;

	public static void main(String args[]) {

		// Argument check
		if (args.length != 1) {
			System.out.println("ERROR:Please enter one argument");
			System.exit(ERR_RESULT);
		}

		// Type check
		Pattern p = Pattern.compile("[0-9]+");
		Matcher m = p.matcher(args[0]);

		if (!m.find()) {
			System.out.println("ERROR:Please enter an integer.");
			System.exit(ERR_RESULT);
		}

		Integer i = Integer.valueOf(args[0]);

		// InputData check
		if(i >= 0) {
			System.out.println("INFO:The value entered is a positive number");
		} else {
			System.out.println("INFO:The value entered is a negative number.");
		}

		System.exit(NML_RESULT);
	}
}