Монте-Карло

using System;

public class Test
{
    static double func(double x) {
        return 1 / (Math.Pow(Math.Cosh(x),2));
    }

    static void monte_carlo() {
        double [] x = {2.7, 3.0, 3.3, 3.7, 4.0, 4.5, 4.9, 5.1};
        double [] y = {0.3, -0.2, -0.7, -1.0, -0.9, -0.5, 0.2, 1.3};

        double in_d = 0.0 , out_d = 0.0;
        for (int i = 0; i<8; i++){
            if (y[i]<func(x[i])){
                in_d += 1;
            }
        }

        Console.WriteLine(in_d/8*3);
    }

    public static void Main()
    {
        monte_carlo();
    }
}