/*****************************************************************************

    Function: stats.c

    Description: reads its infile & reports some statistics
    Parameters:
    Return:

*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <float.h>
#include <string.h>
#define MAXLINE 1000

int main(int argc, char *argv[])
{
char buffer[MAXLINE+1];
char *nums="#.-0123456789";
char *bp;
double x,max,min,mean,sum,ss,sstdev;
unsigned long n=0;
sum = ss = 0;

while (!feof(stdin))
       {
        if (fgets(buffer, MAXLINE,stdin)!= NULL )
          {
                bp = strpbrk(buffer,nums);
                if (bp[0] != '#'){
                        x = atof(strpbrk(buffer,nums));
                        sum=sum+x;
                        ss=ss+x*x;
                        n=n+1;
                        if (n==1){
                           max =min= x ;
                        }
                        else{
                             if (x>max)max=x;
                             if (x<min)min=x;
                        }
                }
          }
        }
 if (n > 0)
   {
    mean = sum/n;
    if (n > 1)
      { sstdev = sqrt((ss-n*mean*mean)/(n-1));
      }
    else
      { sstdev = DBL_MAX;
      }
      printf("n=%lu S=%g SS=%g Mi=%g Me=%g Ma=%g SDv=%g\n",\
      n,sum,ss,min,mean,max,sstdev);

   }
 else
   {
   }

 return 0;
}