题解 | #小球走过路程计算#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        float h = scanner.nextFloat();
        int n = scanner.nextInt();

        //write your code here......
        float sum = 0;
        for (int i = 0; i < n; i++) {
            sum += h;  //每次加上落下来的距离
            h /= 2; //弹起距离缩短一半
            if (i == n - 1) {
                System.out.println(String.format("%.3f", h) + " " + String.format("%.3f", sum));
            }
            sum += h; //弹上去走的距离
        }


    }
}