C :

#include<stdio.h>
int main()
{
	int i,M,N;
	double s,k;
	scanf("%d%d",&M,&N);
	s=M; k=M*1.0/2;
	if(N>=2)
	{  k=k/2;
	for(i=2;i<=N;i++)
	{
		s+=4*k;
		k=k/2;
	}
	}
	printf("%.2lf %.2lf\n",2*k,s);
	return 0;
}