View Code of Problem 72

#include<cstdio>
#include<iostream>
using namespace std;
int main(){
	double n,s;
	cin >> s >> n;
	double sum=s;
	n--;
	while(n--){
		s/=2;
		sum+=2*s;
	}
	s/=2;
	printf("%0.2f",s);
	cout << ' ';
	printf("%0.2f",sum);
}