using System;

public class Program

{

    static Random rnd = new Random(DateTime.Now.Ticks.GetHashCode());

    public static void Main()

    {

        double a,b,c;

        for (int i=0;i<50; i++)

        {

            var n = 40;

            a = rnd.Next(0,n);

            b = rnd.Next(0,n);

            c = rnd.Next(0,n);

            double p = (a+b+c)/2;           

            int s = (int)Math.Sqrt(p*(p-a)*(p-b)*(p-c));

            if (s<=0) continue;

            Console.WriteLine("треугольник сторонами {0:} {1} {2} = {3}",a,b,c,s);

        }

    }

}