package jp.funnything.competition.util;

import java.math.BigInteger;

/**
 * Utility for BigInteger
 */
public class BI {
    public static BigInteger ZERO = BigInteger.ZERO;
    public static BigInteger ONE = BigInteger.ONE;

    public static BigInteger add( final BigInteger x , final BigInteger y ) {
        return x.add( y );
    }

    public static BigInteger add( final BigInteger x , final long y ) {
        return add( x , v( y ) );
    }

    public static BigInteger add( final long x , final BigInteger y ) {
        return add( v( x ) , y );
    }

    public static int cmp( final BigInteger x , final BigInteger y ) {
        return x.compareTo( y );
    }

    public static int cmp( final BigInteger x , final long y ) {
        return cmp( x , v( y ) );
    }

    public static int cmp( final long x , final BigInteger y ) {
        return cmp( v( x ) , y );
    }

    public static BigInteger div( final BigInteger x , final BigInteger y ) {
        return x.divide( y );
    }

    public static BigInteger div( final BigInteger x , final long y ) {
        return div( x , v( y ) );
    }

    public static BigInteger div( final long x , final BigInteger y ) {
        return div( v( x ) , y );
    }

    public static BigInteger mod( final BigInteger x , final BigInteger y ) {
        return x.mod( y );
    }

    public static BigInteger mod( final BigInteger x , final long y ) {
        return mod( x , v( y ) );
    }

    public static BigInteger mod( final long x , final BigInteger y ) {
        return mod( v( x ) , y );
    }

    public static BigInteger mul( final BigInteger x , final BigInteger y ) {
        return x.multiply( y );
    }

    public static BigInteger mul( final BigInteger x , final long y ) {
        return mul( x , v( y ) );
    }

    public static BigInteger mul( final long x , final BigInteger y ) {
        return mul( v( x ) , y );
    }

    public static BigInteger sub( final BigInteger x , final BigInteger y ) {
        return x.subtract( y );
    }

    public static BigInteger sub( final BigInteger x , final long y ) {
        return sub( x , v( y ) );
    }

    public static BigInteger sub( final long x , final BigInteger y ) {
        return sub( v( x ) , y );
    }

    public static BigInteger v( final long value ) {
        return BigInteger.valueOf( value );
    }
}

package com.codejam2012;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class FileUtils {
	
	
	public static String readFile(String fileName){
		FileReader reader = null;
		String temp = null;
		try {
			reader = new FileReader(fileName);
		} catch (FileNotFoundException e1) {
			e1.printStackTrace();
		}
	    StringBuffer strContent = new StringBuffer("");
	    
	    try 
	    {
	      
	      BufferedReader bufferedReader = new BufferedReader(reader);
	      temp =bufferedReader.readLine();
	      while (temp != null)
	      {		    	  
	    	  strContent.append(temp + "\n");
	    	  temp =bufferedReader.readLine();
	      }
	      
	    } 
	    catch (Exception e) 
	    {
	      System.out.println(e);
	    }
	    
	    return strContent.toString();
	}

	public static void appendToFile(String outputFileName, String dataToPrint) {
						 
		File file =new File(outputFileName);
		if(!file.exists()){
			try {
				file.createNewFile();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
		FileWriter fileWritter;
		try {
			fileWritter = new FileWriter(outputFileName,true);
			BufferedWriter bufferWritter = new BufferedWriter(fileWritter);
	        bufferWritter.write(dataToPrint);
	        bufferWritter.close();
	        fileWritter.close();
	        
		} catch (IOException e) {
			e.printStackTrace();
		}
	        
		
		
	}

	public static void deleteFile(String outputFileName) {
		File file =new File(outputFileName);
		if(file.exists()){
			file.delete();
		}
		
	}
	

}
