View Code of Problem 72

#include <iostream>
#include <cstdio>
#include <iomanip>
using namespace std;
int main(){
    int m,n;
    cin>>m>>n;
    double a=0.0,b=0.0;
    a=m,b=m;
    for(int i=1;i<n;i++){
        a=a/2.0;
        b+=2.0*a;
    }
    cout<<fixed<<setprecision(2)<<a/2.0<<" "<<b<<endl;
    return 0;
}