题解 | #求小球落地5次后所经历的路程和第5次反弹的高度#

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNextInt()) { 
            int a = in.nextInt();
            double d = a;
            //记录下落的路程
            double sum1 = 0;
            //记录弹起的路程
            double sum2 = 0;
            for(int i = 0; i<5; i++){
                sum1 += d;
                d = d/2;
                sum2 += d;
            }
            //第五次之后未弹起，须减掉
            System.out.println(sum1 + sum2 - d);
            System.out.println(d);
        }
    }
}