public class LogFact2 {
    // Notkun: x = logFact(N)
    // Fyrir: N >= 0
    // Eftir: x = log(N!)
    public static double logFact(int N) {
        double s = 0.0;
        for (int i = 1; i <= N; i++) {
            s += Math.log(i);
        }
	return s;
    }
}