Twenty Questions in java programe

TwentyQuestions.java

public class TwentyQuestions

{

             public static int search(int lo, int hi)

   {

        if ((hi - lo) == 1) return lo;

        int mid = lo + (hi - lo) / 2;

        StdOut.printf("Is it less than %d?  ", mid);

        if (StdIn.readBoolean()) return search(lo, mid);

        else                    

        return search(mid, hi);

    }

    public static void main(String[] args)

   {

        int n = Integer.parseInt(args[0]);

        int N = (int) Math.pow(2, n);

        StdOut.printf("Think of an integer between %d and %d\n", 0, N-1);

        int v = search(0, N);

        System.out.printf("Your number is %d\n", v);

    }

              }