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#

用笔算最容易

import java.util.*;

public class Main {
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        String num1 = String.format("%.6f",n*2.875);
        while(num1.endsWith("0")){
            num1 = num1.substring(0,num1.length()-1);
        }
        String num2 = String.format("%.6f",n*0.03125);
        while(num2.endsWith("0")){
            num2 = num2.substring(0,num2.length()-1);
        }
        System.out.println(num1);
        System.out.println(num2);
    }
}