[TestMethod]
        public void GetNOD()
        {
            int gcd = retNOD(new int[] { 5, 8 });

            Assert.IsTrue(gcd==1);

            gcd = retNOD(new int[] { 120, 45 });

            Assert.IsTrue(gcd == 15);
        }

        int retNOD(int[] array)
        {
            int gcd = Gcd(array[0], array[1]);
            for (int i = 2; i < array.Length; i++)
                gcd = Gcd(gcd, array[i]);

            return gcd;
        }

        int Gcd(int a, int b)
        {
            return a > 0 ? Gcd(b % a, a) : b;
        }