while nesting 1811

//#2
אישרת לי בכיתה אז לא פרסמתי

//#3
            int i, j, max = -1, maxall = -1, students, grade;
            for (i = 0; i < 30; i++)
            {
            students = int.Parse(Console.ReadLine());
                max = -1;
                for (j = 0; j < students; j++)
                {
                    grade = int.Parse(Console.ReadLine());
                    if (grade > max)
                        max = grade;
                    if (grade > maxall)
                        maxall = grade;
                }
                Console.WriteLine(max);
            }
            Console.WriteLine(maxall);

//#4
            int drives, km, total = 0, i, j, totaldriver = 0;
            for (i = 0; i < 30; i++)
            {
                drives = int.Parse(Console.ReadLine());
                totaldriver = 0;
                for (j = 0; j < drives; j++)
                {
                    km = int.Parse(Console.ReadLine());
                    totaldriver += km;
                    total += km;
                }
                Console.WriteLine("total km: {0}, total fuel: {1}", totaldriver, (totaldriver / 10));
            }
            Console.WriteLine(total);

//fibonacci
            int first = 1, second = 1, third, i;
            for (i = 0; i < 10; i++)
            {
                Console.WriteLine(first);
                third = first + second;
                first = second;
                second = third;
            }