SoftUni/C#Advanced/WeakStudents

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

public class Startup
{
    public static void Main()
    {
        string input = Console.ReadLine();
        List<Student> students = new List<Student>();
        List<double> studentMarks = new List<double>();

        string saveMarks = string.Empty;
        string saveNames = string.Empty;

        while (!input.Contains("END"))
        {
            string patternName = @"([a-zA-Z]+\s[a-zA-Z]+)";// take only digits separated by empty space
            string patternMarks = @"\s([\d\s]+)"; // take the words

            Regex regexMark = new Regex(patternMarks);
            Regex regexName = new Regex(patternName);

            MatchCollection matchCollection = regexMark.Matches(input);
            MatchCollection matchCollection2 = regexName.Matches(input);

            foreach (Match match in matchCollection)
            {
                saveMarks = ((match.Groups[1].ToString()));
            }

            foreach (Match match in matchCollection2)
            {
                saveNames = ((match.Groups[1].ToString()));
            }

            studentMarks.AddRange(saveMarks.Split().Select(double.Parse).ToList());

            string[] splitInput = saveNames.Split();
            string fName = splitInput[0];
            string lName = splitInput[1];

            students.Add(new Student(fName, lName, studentMarks));

            studentMarks.Clear();
            input = Console.ReadLine();
        }

        foreach (var student in students.Where(x => x.Marks.Any(y => y == 3) && x.Marks.Any(y => y < 3)))
        {
            Console.WriteLine($"{student.FirstName} {student.LastName}");
        }
    }
}

public class Student
{
    public string FirstName { get; set; }

    public string LastName { get; set; }

    public List<double> Marks { get; set; } = new List<double>();

    public Student(string fName, string lName, List<double> marks)
    {
        this.FirstName = fName;
        this.LastName = lName;
        Marks.AddRange(marks);
    }
}