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.File;
import java.io.FileReader;
import java.io.IOException;


public class CodeJamTextInputReader {
	private final BufferedReader reader;
	private final int numberOfTestCases;
	private int lastReadTestCase = 0;
	
	public CodeJamTextInputReader(File inputFile) throws IOException, InvalidInputException {
		reader = new BufferedReader(new FileReader(inputFile));
		
		numberOfTestCases = readInNumberOfTestCases();
	}
	
	private int readInNumberOfTestCases() throws IOException, InvalidInputException {
		String firstLine = reader.readLine();
		try {
			return Integer.parseInt(firstLine);
		}
		catch (NumberFormatException e) {
			throw new InvalidInputException("Expected first line to be number of test cases", e);
		}
	}

	public boolean hasNextTestCase() {
		return numberOfTestCases != lastReadTestCase;
	}
	
	public String readNextLine() throws IOException {
		++lastReadTestCase;
		
		return reader.readLine();
	}
	
	public int getLastReadTestCaseNumber() {
		return lastReadTestCase;
	}
	
	public void close() throws IOException {
		this.reader.close();
	}
}
