import java.io.*;

class Util{

    public static int readInt () {
        byte[] bytes = new byte[160];
        try {
            System.in.read(bytes);
        } 
        catch (Exception e) {
            System.out.println ("Erro: " + e);
        }
        char[] caracts = new char[160];
        for (int i = 0; i < 160; i++)
            caracts[i] = (char) bytes[i];
        String str = new String(caracts);
        return (Integer.parseInt(str.trim()));
    }
    
    public static double readDbl(){
        byte[] bytes = new byte[160];
        try {
            System.in.read(bytes);
        } 
        catch (Exception e) {
            System.out.println ("Erro: " + e);
        }
        char[] caracts = new char[160];
        for (int i = 0; i < 160; i++)
            caracts[i] = (char) bytes[i];
        String str = new String(caracts);
        return (Double.valueOf(str.trim())).doubleValue();
    }

    public static String readStr () {
        byte[] bytes = new byte[160];
        try {
            System.in.read(bytes);
        }
        catch (Exception e) {
            System.out.println ("Erro: " + e);
        }
        char[] caracts = new char[160];
        for (int i = 0; i < 160; i++)
            caracts[i] = (char) bytes[i];
        String str = (new String(caracts)).trim();
        return str;
    }

    public static void waitEnter () {
        byte[] bytes = new byte[160];
        try {
            System.in.read(bytes);
        }
        catch (Exception e) {
            System.out.println ("Erro: " + e);
        }
    }
}