小球落地问题

public class  Test{
public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    int M = scanner.nextInt(); //总高度
    int N = scanner.nextInt(); //反弹的次数
    double height = 0,sum = M;
    for(int i=1;i<=N;i++) {
        height=M/Math.pow(2, i);
        if(i<N) {
            sum += 2*height;
        }else if(i==N) {
            sum += 0;
        }
    }
    String h = String.format("%.2f", height);
    String s = String.format("%.2f", sum); 
    System.out.println(h+" "+s);
  }
}