/************************************************************************************
* Section 15
* M/c No : M
* Roll No : 18CS100XY
* Names : Soumyajit Dey, Aritra Hazra
* Assignment No : 1b
* Description : Program to find arithmatic-mean, harmonic-mean and standard-deviation
*************************************************************************************/

#include <stdio.h>
#include <math.h>

int main()
{
  double a, b, c, d, e;
  double am, hm, sd;
  printf("Enter Five Positive Real Numbers: ");
  scanf("%lf %lf %lf %lf %lf", &a, &b, &c, &d, &e);

  am = (a + b + c + d + e) / 5;
  hm = 5 / (1/a + 1/b + 1/c + 1/d + 1/e);
  sd = sqrt( (a*a + b*b + c*c + d*d + e*e)/5 - (am * am) );

  printf("AM = %lf, HM = %lf, SD = %lf\n", am, hm, sd);

  return 0;
}