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#

找规律就行
每次都是之前高度的一半

#include<iostream>
#include<vector>
using namespace std;
vector<double> reboundHigh(double h, int n);
int main(){
    int h;
    int n = 5;
    while(cin >> h){
        vector<double> v1 = reboundHigh(h, n);
        double sum = v1[0];
        for(int i = 1; i < v1.size() - 1; ++i){
            sum += v1[i] * 2;
        }
        cout << sum << endl << v1[v1.size() - 1] << endl;
    }
    return 0;
}

vector<double> reboundHigh(double h, int n){
    vector<double> res(n + 1, 0);
    res[0] = h;
    for(int i = 1; i < res.size(); ++i){
        res[i] = res[i - 1] /double(2);
    }
    return res;
}