import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintStream;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;
import java.util.StringTokenizer;

public class StockAnalysis 
{
    public static void main(String[] args) throws FileNotFoundException, ParseException
    {
	PrintStream output = System.out;

	String symbol = "gts";
	String fileName = symbol + ".csv";
	File file = new File(fileName);
	Scanner fileInput = new Scanner(file);
	
	fileInput.nextLine(); // skip first line

	double highest = 0;
	Date dateOfHighest = null;
	double lowest = Double.MAX_VALUE;
	Date dateOfLowest = null;
	while (fileInput.hasNextLine())
	{
	    String line = fileInput.nextLine();
	    StringTokenizer tokenizer = new StringTokenizer(line, ",");
	    SimpleDateFormat format = new SimpleDateFormat("dd/MM/yyyy");
	    Date date = format.parse(tokenizer.nextToken());
	    tokenizer.nextToken(); // skip second token
	    double high = Double.parseDouble(tokenizer.nextToken());
	    double low = Double.parseDouble(tokenizer.nextToken());
	    if (high > highest)
	    {
		highest = high;
		dateOfHighest = date;
	    }
	    if (low < lowest)
	    {
		lowest = low;
		dateOfLowest = date;
	    }
	}
	fileInput.close();

	final double PERCENT = 100;
	if (dateOfLowest.before(dateOfHighest))
	{
	    double profit = PERCENT * (highest - lowest) / lowest;
	    output.printf("If I had bought %4$s shares on %1$tm/%1$td/%1$ty%nand sold them on %2$tm/%2$td/%2$ty%nI would have made a %3$.2f%% profit%n", dateOfLowest, dateOfHighest, profit, symbol);
	}
	else
	{
	    double loss = PERCENT * (highest - lowest) / highest;
	    output.printf("If I had bought %4$s shares on %1$tm/%1$td/%1$ty%nand sold them on %2$tm/%2$td/%2$ty%nI would have made a %3$.2f%% loss%n", dateOfHighest, dateOfLowest, loss, symbol);
	}
    }
}