using System; using System.IO; namespace D05._1 { class Program { static void Main(string[] args) { if (args.Length < 1) throw new ArgumentException(); if (File.Exists(args[0]) == false) throw new FileNotFoundException(); int goodStrings = 0; using (var file = File.OpenText(args[0])) { while (true) { var line = file.ReadLine(); if (line == null) break; if (IsGoodString(line)) goodStrings++; } } Console.WriteLine($"The answer is : {goodStrings}"); } private static bool IsGoodString(string line) { int vowels = 0; int repeted = 0; bool isBad = false; char last = '\0'; foreach (var c in line) { if (c == 'a' || c == 'o' || c == 'i' || c == 'e' || c == 'u') vowels++; if (c == last) repeted++; if ((last == 'a' && c == 'b') || (last == 'c' && c == 'd') || (last == 'p' && c == 'q') || (last == 'x' && c == 'y')) { isBad = true; break; } last = c; } return isBad == false && repeted > 0 && vowels >= 3; } } }