import java.io.*;

class LoggingFacility{
	private static PrintStream ps;
	public static void log(String s){
		try{
			if (ps == null)
				ps = new PrintStream(new FileOutputStream("log.txt"));
			ps.println(s);
		}catch(IOException e){
			System.err.println("Could not open log file");
		}
	}

	public static void setLogToFile(){
		try{
			ps = new PrintStream(
				new FileOutputStream("log.txt", true) );
		}catch(IOException e){
			System.err.println("Could not open log file");
		}

	}

	public static void setLogToConsole(){
		ps = System.out;
	}
}