import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

/**

* Keyboard input functions. Doesn't validate user's input.

* Adapted code from university assignments.

* @author Professor Delamaro

*/

public class Input {

static InputStreamReader isr = new InputStreamReader(System.in);

static BufferedReader br = new BufferedReader(isr);

/**

* Read a string typed by the user until \n

* @return string typed by the user

* @throws IOException

*/

public static String readString() throws IOException {

String x;

x = br.readLine();

return x;

}

/**

* Read a string and convert it to int. Doesn't validate user's input.

* @return value typed by the user

* @throws IOException

*/

public static int readInt() throws IOException {

String x = readString();

return Integer.parseInt(x);

}

/**

* Read a string and convert it to double. Doesn't validate user's input.

* @return value typed by the user

* @throws IOException

*/

public static double readDouble() throws IOException {

String x = readString();

return Double.parseDouble(x);

}

}