题解 | #计算小球走过的路程和反弹高度#

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

int main() {

    // 下落的高度和落地的次数
    double h;
    int n;

    cin >> h;
    cin >> n;

    //小球第n次落地经过的距离
    double sum = h;

    for (int i = 1; i <= n; i++) {
        if (i == 1) {
            h = h / 2;
        } else {
            sum = sum + 2 * h;
            h = h / 2;
        }


    }
    cout << setiosflags(ios::fixed) << setprecision(1) << sum << " ";
    //cout << sum << " ";
    cout << setiosflags(ios::fixed) << setprecision(1) << h << endl;

    return 0;
}