OpIsAFaggot.cs

using System;
using System.Linq;

class Student {
  public string Name { get; set; }
  public int Id { get; set; }
}

struct ExamResult {
  public Student Who { get; set; }
  public DateTime When { get; set; }
  public int Mark { get; set; }
}

namespace OpIsAFaggot {
  class Program {
    static void Main(string[] args) {
      var names = new[] {"Славик", "Ванька", "Митяй", "Глеб", "Данил"};
      var surnames = new[] {"Сычёв", "Шеремет", "Бафомет", "Срака"};
      var random = new Random();
      var students = Enumerable.Repeat(1, 10)
        .Select(x => new Student {
          Name = names[random.Next(names.Length)]
                 + surnames[random.Next(surnames.Length)],
          Id = random.Next(1000, 9999)
        });
      Func<ExamResult[]> readExam =
        () => students.Select(x => new ExamResult {
            Who = x,
            Mark = int.Parse(Console.ReadLine()),
            When = DateTime.Parse(Console.ReadLine())
          }).ToArray();
      var матиша = readExam();
      var русиш = readExam();
      var losers = students.Where(
        x => матиша.First(y => y.Who == x).Mark < 3
             && русиш.First(y => y.Who == x).Mark < 3
      );
      foreach (var loser in losers) {
        Console.WriteLine("{0} is a loser!", loser);
      }
    } // void Main
  } // class
} // ns