private void DoSetTasksData(string input)
{
//studentId courseId taskName//score
var parts = ReadHelper.SplitInput(input, 4, _inputDelimiter);
var studentId = ReadHelper.ParseIntSave(parts[0], "StudentId");
var student = GetStudentById(studentId);
var courseId = ReadHelper.ParseIntSave(parts[1], "CourseId");
if (student.CourseId != courseId)
{
// TODO custom exception
throw new InvalidOperationException($"Student with id: {studentId} is not sign to course with id: {courseId}");
}
student.AddTask(new Task(parts[2], ReadHelper.ParseFloatSave(parts[3], "Task Id")));
}