static void Main(string[] args)
{
Statistics st = new Statistics();
Addition(st);
Console.WriteLine("OUTPUT ALL STATISTICS!\n");
Console.WriteLine(st.ToString());
Console.WriteLine("OUTPUT ONLY THOSE STUDENTS WHO HAD A STIPEND AFTER 1 SEMESTER!\n");
st.WithStipend1sem();
Console.WriteLine("OUTPUT ALL MARKS BY MATAN IN 1 SEMESTER!\n");
st.Marks1semMatan();
Console.WriteLine("OUTPUT BY FIRST CHARACTER IN FIO!\n");
st.SortByName();
Console.WriteLine("OUTPUT ONLY THOSE ID OF STUDENTS WHO HAD A STIPEND AFTER 1 SEMESTER!\n");
st.IDWithStipend1sem();
}
