View Code of Problem 72

#include<stdio.h>
int main()
{
  int i,N;
  double M,sum=0.0;
  scanf("%1f%d",&M,&N);
  for(i=1;i<=N;i++)
  {
    if(i=1)
      sum+=M;
    else
      sum=M/2;
    M=M/2;
  }
  printf("%.21f%.21f",M,sum);
  return 0;
}