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.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) {
        BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder ans = new StringBuilder();
        String a;
        try {
            a = r.readLine();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        char[] h = a.toCharArray();
        int i = 0, l = h.length;
        float hei = 0.0f, tol5;
        do {//获得高度，浮点数
            hei *= 10;
            hei += h[i] - '0';
            i++;
        } while (i < l);
        i = 1;
        tol5 = -hei;//第0次落地时，球经过的米数为-h，球的开始点是地面
        do {
            tol5 += hei * 2;
            hei /= 2;
            i++;
        } while (i < 6);
        ans.append(tol5).append("\n").append(hei);
        System.out.print(ans);
    }
}