华为机试：求小球落地5次后所经历的路程和第5次反弹的高度

#include <iostream>
#include <cmath>
using namespace std;

double length (int n, int time) {
    if (time == 1) return n;
    return (double)n / (double)pow(2, time - 2) + length(n, time - 1);
}

int main() {
    int n;
    cin >> n;
    cout << length(n, 5) << endl;
    cout << (double)n / (double)pow(2, 5) << endl;
    return 0;
}