interface IAnimal
    {
        string Name { get; set; }
        int CalculateSomeValue();
    }

    class Dog : IAnimal
    {
        public int weight;
        public string Name { get; set; }

        public  int CalculateSomeValue()
        {
            return weight;
        }
    }

    class Cat : IAnimal
    {
        public int bloodPressure;
        public string Name { get; set; }
        public int CalculateSomeValue()
        {
            return bloodPressure;
        }
    }