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;
	
  	// 初始路径长度和回弹高度
    double len = h;
    double hight = h/2;
  
    if (n == 1) cout << fixed << setprecision(1) << len << " " << hight << endl;
    else{
        for (int i = 1; i < n; i++){
            len = len + 2 * hight;
            hight = hight/2;
        }
        
        cout << fixed << setprecision(1) << len << " " << hight << endl;
    }
        

    return 0;
}