public void Example8()
        {
            int [,] map = new int [, ] {
                {}
            };

            int countries = CountryCalculator.CalculateCountries(map);

            Assert.AreEqual(0, countries);
        }
        public void Example7()
        {
            int[,] map = new int[, ] {
                { 1, 2, 1, 2 },
                { 1, 1, 2, 1 }
            };

            int countries = CountryCalculator.CalculateCountries(map);

            Assert.AreEqual(6, countries);
        }
        public void Example10()
        {
            int[,] map = new int[, ] {
                { 1, 2, 3, 3, 1 },
                { 1, 1, 2, 0, 1 },
                { 2, 2, 3, 3, 0 }
            };

            int countries = CountryCalculator.CalculateCountries(map);

            Assert.AreEqual(9, countries);
        }