public void Run()
        {
            string input = "";
            Console.WriteLine("Enter path to file, if file doesn't exist calculates answer to problem 18");
            string path = Console.ReadLine();

            if (File.Exists(path))
            {
                input = File.ReadAllText(path);
            }
            else
            {
                input =
                            "75\n" +
                            "95 64\n" +
                            "17 47 82\n" +
                            "18 35 87 10\n" +
                            "20 04 82 47 65\n" +
                            "19 01 23 75 03 34\n" +
                            "88 02 77 73 07 63 67\n" +
                            "99 65 04 28 06 16 70 92\n" +
                            "41 41 26 56 83 40 80 70 33\n" +
                            "41 48 72 33 47 32 37 16 94 29\n" +
                            "53 71 44 65 25 43 91 52 97 51 14\n" +
                            "70 11 33 28 77 73 17 78 39 68 17 57\n" +
                            "91 71 52 38 17 14 91 43 58 50 27 29 48\n" +
                            "63 66 04 68 89 53 67 30 73 16 69 87 40 31\n" +
                            "04 62 98 27 23 09 70 98 73 93 38 53 60 04 23\n";
            }
            //uses the Triangle class from Problem18
            Triangle tr = new Triangle(input);
            Console.WriteLine(tr.GetMaxTotal());
        }
        public void Run()
        {
            string input =
                        "75\n" +
                        "95 64\n" +
                        "17 47 82\n" +
                        "18 35 87 10\n" +
                        "20 04 82 47 65\n" +
                        "19 01 23 75 03 34\n" +
                        "88 02 77 73 07 63 67\n" +
                        "99 65 04 28 06 16 70 92\n" +
                        "41 41 26 56 83 40 80 70 33\n" +
                        "41 48 72 33 47 32 37 16 94 29\n" +
                        "53 71 44 65 25 43 91 52 97 51 14\n" +
                        "70 11 33 28 77 73 17 78 39 68 17 57\n" +
                        "91 71 52 38 17 14 91 43 58 50 27 29 48\n" +
                        "63 66 04 68 89 53 67 30 73 16 69 87 40 31\n" +
                        "04 62 98 27 23 09 70 98 73 93 38 53 60 04 23\n";

            Triangle tr = new Triangle(input);
            Console.WriteLine(tr.GetMaxTotal());
        }