import java.util.ArrayList;
import java.util.Scanner;
import java.util.StringTokenizer;


public class JohnChecker
{
	public static final int MAX_VAL = 150000;

	public static int exitCode = 42;

    public static void printError(int line, String msg)
	{
		System.out.println("ERROR Line " + line + ": " + msg);
		exitCode = -1;
	}

    public static void checkIntBounds(int x, int min, int max, String name, int nLines)
    {
        if (x < min || x > max)
            printError(nLines, "invalid " + name + " value: " + x);
    }

    public static void checkCharBounds(char x, char min, char max, String name, int nLines)
    {
        if (x < min || x > max)
            printError(nLines, "invalid " + name + " value: " + x);
    }

    public static void checkDoubleBounds(double x, double min, double max, String name, int nLines)
    {
        if (x < min || x > max)
            printError(nLines, "invalid " + name + " value: " + x);
    }

    public static int nextInt(StringTokenizer st)
    {
        return Integer.parseInt(st.nextToken());
    }

    public static void main(String [] args)
	{
		Scanner in = new Scanner(System.in);
		int n;
		String line;
		int nLines=0;

        line = in.nextLine();
        nLines++;
        StringTokenizer st = new StringTokenizer(line);
        if (st.countTokens() != 1)
            printError(nLines, "number of values on line incorrect");
        n = nextInt(st);
        checkIntBounds(n, 1, MAX_VAL, "n", nLines);
 
        if (in.hasNextLine())
        		printError(nLines, "too many lines");
        System.exit(exitCode);
	}
}