using System;

class Program
{
    static int VariantFromStudentNumber(int n) => (n % 2 != 0) ? 1 : 2;

    static int ScoreVariant1(double x, double y)
    {
        var r = Math.Sqrt(x * x + y * y);
        if (r <= 1) return 10;
        if (r <= 2) return 5;
        if (r <= 3) return 2;
        return 0;
    }

    static int Sector(double x, double y)
    {
        var a = Math.Atan2(y, x);
        if (a > Math.PI / 4 && a <= 3 * Math.PI / 4) return 1;
        if (a > -Math.PI / 4 && a <= Math.PI / 4) return 5;
        if (a > -3 * Math.PI / 4 && a <= -Math.PI / 4) return 2;
        return 3;
    }

    static int ScoreVariant2(double x, double y)
    {
        var r = Math.Sqrt(x * x + y * y);
        if (r <= 1) return 10;
        if (r <= 3) return Sector(x, y);
        return 0;
    }

    static void Main()
    {
        Console.Write("Номер по списку: ");
        int student = int.Parse(Console.ReadLine());
        int variant = VariantFromStudentNumber(student);

        Console.Write("Сколько выстрелов: ");
        int n = int.Parse(Console.ReadLine());

        Console.Write("Случайный центр? (y/n): ");
        bool rndCenter = Console.ReadLine().Trim().ToLower() == "y";

        Console.Write("Случайная помеха? (y/n): ");
        bool noise = Console.ReadLine().Trim().ToLower() == "y";

        var rnd = new Random();
        double cx = 0, cy = 0;
        if (rndCenter)
        {
            cx = rnd.NextDouble() * 2 - 1;
            cy = rnd.NextDouble() * 2 - 1;
        }

        int sum = 0;
        for (int i = 0; i < n; i++)
        {
            Console.Write($"Выстрел {i + 1} (x y): ");
            var parts = Console.ReadLine().Trim().Split(new[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
            double x = double.Parse(parts[0]);
            double y = double.Parse(parts[1]);

            if (noise)
            {
                x += (rnd.NextDouble() * 0.2 - 0.1);
                y += (rnd.NextDouble() * 0.2 - 0.1);
            }

            x -= cx;
            y -= cy;

            int s = variant == 1 ? ScoreVariant1(x, y) : ScoreVariant2(x, y);
            sum += s;
            Console.WriteLine($"Очки: {s}, сумма: {sum}");
        }

        Console.WriteLine($"Итоговая сумма: {sum}");
    }
}

