杭电ACM_2009

2009 c
[code]
#include<stdio.h>

#include<math.h>

main()

{

  int m,i;

  double n;

  double sum;

while(scanf("%lf%d",&n,&m)!=EOF)

  {

   sum=n;

   for(i=1;i<m;i++)

    {

     n=sqrt(n);
     sum+=n;

   }

  printf("%.2lf\n",sum);

 }

}
[/code]