/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package IO;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
    
/**
 * 
 * @author dannocz
 */
public class InputReader {
    
    public static Input readFile(String filename){
        try {
              
              /*  Sets up a file reader to read the file passed on the command
          77        line one character at a time */
              FileReader input = new FileReader(filename);
              
              /* Filter FileReader through a Buffered read to read a line at a
                 time */
              BufferedReader bufRead = new BufferedReader(input);
              
              String line;    // String that holds current file line
              int count = 0;  // Line number of count 
              ArrayList<String> cases= new ArrayList<String>();
              
              // Read first line
              line = bufRead.readLine();
              int noTestCases=Integer.parseInt(line);
              count++;
              
              // Read through file one line at time. Print line # and line
              while (count<=noTestCases){
                  //System.out.println("Reading. "+count+": "+line);
                  line = bufRead.readLine();
                  cases.add(line);
                  count++;
              }
              
              bufRead.close();
              
              return new Input(noTestCases,cases);
              
          }catch (ArrayIndexOutOfBoundsException e){
              /* If no file was passed on the command line, this expception is
              generated. A message indicating how to the class should be
              called is displayed */
              e.printStackTrace();        
  
          }catch (IOException e){
              // If another exception is generated, print a stack trace
              e.printStackTrace();
          }
        
        return null;
          
      }// end main
    }

package qualification.Dancing;

import java.io.*;

public class IO {

    /**
     * Reads a line of text from the input.
     *
     * @return The text entered. @comp Best and worst case are O(U) where U is
     * the complexity of BufferedReader.readLine method for the input.
     */
    public static String readln() {
        InputStreamReader input = new InputStreamReader(System.in);
        BufferedReader keyboard = new BufferedReader(input);

        try {
            return keyboard.readLine();
        } catch (IOException e) {
            println("Unexpected exception while reading input.");
        }
        return null;
    }

    /**
     * Terminates the current line by writing the line separator string. The
     * line separator string is defined by the system property line.separator,
     * and is not necessarily a single newline character ('\n').
     *
     * @pre none @post none @complexity Best and worst case are the same. Time
     * complexity is U where U is the complexity for System.out.println()
     * method.
     */
    public static void println() {
        System.out.println();
    }

    /**
     * Prints a string. If the argument is null then the string "null" is
     * printed. Otherwise, the string's characters are converted into bytes
     * according to the platform's default character encoding, and these bytes
     * are written in exactly the manner of the write(int) method.
     *
     * @param s The string to print. @complexity Best and worst case are the
     * same. Time complexity is U where U is the complexity for
     * System.out.print(String) method. @pre none @post none
     */
    public static void print(String s) {
        System.out.print(s);
    }

    /**
     * Prints a String and then terminate the line. This method behaves as
     * though it invokes print(String) and then println().
     *
     * @param s The string to print. @complexity Best and worst case are the
     * same. Time complexity is U where U is the complexity for
     * System.out.print(String) method. @pre none @post none
     */
    public static void println(String s) {
        print(s);
        println();
    }

    public static int readInt() {
        try {
            int val = Integer.parseInt(readln());

            return val;
        } catch (NumberFormatException ex) {
            println("Not an integer.");
        }

        return -1;
    }
}