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 );
    }
}

import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.FileReader;

@SuppressWarnings("CallToThreadDumpStack")
public class Utils
{
    private static FileOutputStream outStream;
    private static BufferedReader reader;
    private static boolean debug = false;

    public static void openOutFile(String str, boolean debug)
    {
        Utils.debug = debug;
        try { outStream = new FileOutputStream(str, false); }
	catch (Exception e) { e.printStackTrace(); }
    }

    public static void openInFile(String str)
    {
        try { reader = new BufferedReader(new FileReader(str)); }
	catch (Exception e) { e.printStackTrace(); }
    }

    public static void closeOutFile()
    {
        try { outStream.close(); }
	catch (Exception e) { e.printStackTrace(); }
    }

    public static void closeInFile()
    {
        try { outStream.close(); }
	catch (Exception e) { e.printStackTrace(); }
    }

    public static String readFromFile()
    {
        try { return reader.readLine(); }
        catch (Exception e) { e.printStackTrace(); }
        return null; // shouldn't get here
    }
    public static void writeToFile(String str)
    {
        if (debug) System.out.println(str);
        try
        {
            for(int k=0; k<str.length(); k++)
            {
                outStream.write(str.charAt(k));
            }
            outStream.write(13);
            outStream.write(10);
        }
	catch (Exception e)
            { e.printStackTrace(); }
    }

}
