题解 | #小球走过路程计算#

import java.util.Scanner; import java.lang.String;

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;
    int i = 0;
    //至少落地一次，所以采用do while循环
    do{
        if(i == 0){
            sum = sum + h;
        }else{
            sum = sum + 2 * h;
        }
        h = h/2;
        i++;
    }while(i < n);
    //输出格式为：System.out.println(String.format("%.3f", h)+" "+String.format("%.3f", sum));
    System.out.println(String.format("%.3f", h)+" "+String.format("%.3f", sum));
}

}