View Code of Problem 72

#include <iostream>
#include <cstdio>
#include <iomanip>
using namespace std;
int main(){
    double m,n;
    cin>>m>>n;
    double sum=m;
    for(int i=0;i<n-1;i++){
        m=m/2.0;
        sum+=2.0*m;
    }
    cout<<fixed<<setprecision(2)<<m/2<<" "<<sum<<endl;
    return 0;
}