Test task

Here are 2 problems. Feel free to solve any of them or both of them. The more, the better

First problem

Your task is to write a method that calculates the max possible quality of the computer cluster. Cluster consists of one or more machines. Your method will take the following params

• array of the computers' speeds, e.g. [10, 5, 7, 12, 130]
• array of the computers' reliabilities, e.g. [3, 6, 8, 9, 10]
• and the maximum of the machines number that can be included into the cluster, e.g. 3

So, you are expected to write a method like this

def your_method_name(speeds, reliabilities, max_machines_number)
  # your code
end

Feel free to add any number of methods if you want to make the program more readable.

The quality for chosen set of machines is calculated the following way:

quality = (sum of the speeds of the chosen machines) * (minimum reliabilities of the chosen machines)

For example, you have the following input params:

speeds = [10, 5, 7, 12, 130]
reliabilities = [3, 6, 8, 9, 10]
max_number = 3

And you've chosen 1st (index 0), 3rd (index 2) and 4th (index 3) machines. Their characteristics are the corresponding values at arrays

The quality for that cluster will be (10 + 7 + 12) * (min(3, 8, 9)) = 29 * 3 = 87

NB:

• the sizes of speeds and reliabilities arrays are expected to have equal size
• the sizes are dynamic (don't assume that theay are always equal to 5, there can be more machines for chose)
• the max_machines_number might differ from one test case to another
• pay attention to word "maximum" in the max_machine_number parameter.

Second problem

Create a ruby file so that the instructions at the bottom of the file give the specified result

# your code here

puts one.plus.one.equals              # => 2
puts two.plus.two.minus.three.equals  # => 1