View Code of Problem 72

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