/*
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 * and open the template in the editor.
 */

/**
 *
 * @author LH
 */
import java.io.*;
import java.math.BigDecimal;
import java.math.BigInteger;

class InteractiveIO
{

    private static  BufferedReader br = new BufferedReader(new InputStreamReader(
                System.in));;

    public static void write(String s) throws Exception
    {
        writeAndFlush(s);
    }

    public static  String promptAndRead(String s) throws
            Exception
    {
        writeAndFlush(s);
        return br.readLine();
    }

    private static void writeAndFlush(String s) throws
            Exception
    {
        System.out.println(s);
        System.out.flush();
    }
    
    public static int promptForInt(String s) throws
            Exception
    {
        return Integer.parseInt(promptAndRead(s.trim()));
    }

    public static long promptForLong(String s) throws
            Exception
    {
        return Long.parseLong(promptAndRead(s.trim()));
    }
    
    public static float promptForFloat(String s) throws
            Exception
    {
        return Float.parseFloat(promptAndRead(s.trim()));
    }

    public static double promptForDouble(String s) throws
            Exception
    {
        return Double.parseDouble(promptAndRead(s.trim()));
    }

    public static BigDecimal promptForBigDecimal(String s) throws
            Exception
    {
        return new BigDecimal(promptAndRead(s.trim()));
    }

    public static BigInteger promptForBigInteger(String s) throws
            Exception
    {
        return new BigInteger(promptAndRead(s.trim()));
    }
    
}