title: Find Harmonic Mean Using Arithmetic Mean Geometric Mean
signature: function find_harmonic_mean_using_arithmetic_mean_geometric_mean(a, b)
test_code: using Printf
  
  # SOLUTION CODE
  # ============================================
  PLACEHOLDER_CODE_BODY
  
  # TESTING CODE 
  # ============================================
  function validate_solution(actual, expected)
      return abs(actual - expected) < 1e-09
  end
  
  function driver(a, b, expected)
      try
  
          if validate_solution(PLACEHOLDER_FN_NAME(a, b), expected)
              return "PASSED";
          end
          return "FAILED";
      catch exception_obj
          return string(Base.typename(typeof(exception_obj)).wrapper);
      end
  end
  
  function main()
      
      result = driver(54, 83, 65.43065693430657);
      @printf("TEST-0...%s\n",result);
      
      result = driver(42, 56, 48.0);
      @printf("TEST-1...%s\n",result);
      
      result = driver(63, 12, 20.16);
      @printf("TEST-2...%s\n",result);
      
      result = driver(19, 76, 30.4);
      @printf("TEST-3...%s\n",result);
      
      result = driver(41, 50, 45.054945054945065);
      @printf("TEST-4...%s\n",result);
      
      result = driver(7, 26, 11.030303030303031);
      @printf("TEST-5...%s\n",result);
      
      result = driver(39, 42, 40.444444444444436);
      @printf("TEST-6...%s\n",result);
      
      result = driver(11, 64, 18.773333333333333);
      @printf("TEST-7...%s\n",result);
      
      result = driver(96, 81, 87.86440677966101);
      @printf("TEST-8...%s\n",result);
      
      result = driver(15, 54, 23.47826086956522);
      @printf("TEST-9...%s\n",result);
      
  end
  
  main()
source_py: def find_harmonic_mean_using_arithmetic_mean_geometric_mean(a, b):
      AM = ((a + b) / 2)
      GM = math.sqrt((a * b))
      HM = ((GM * GM) / AM)
      return HM
source_cpp: double find_harmonic_mean_using_arithmetic_mean_geometric_mean(int a, int b) {
    double AM, GM, HM;
    AM = ( a + b ) / 2;
    GM = sqrt ( a * b );
    HM = ( GM * GM ) / AM;
    return HM;
  }