题解 | 计算小球走过的路程和反弹高度

#include<iostream>
#include<cmath>
#include<iomanip>
using namespace std;
int main()
{
    int h,times;
    cin >> h >> times;
    double distance;
    distance = 3*h-2*h*pow(0.5,times-1);
    double h2=h/(2*pow(2,times-1));
    cout << fixed << setprecision(1) << distance << ' ' << h2 << endl;
    return 0;
}

用等比数列以及等比数列求和