Vajdalinky, C# - rextester

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//Title of this code
//Rextester.Program.Main is the entry point for your code. Don't change it.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Calculate()
        {
            
            int lower = 0;
            int higher = 0;
            int lower2 = 0;
            int higher2= 0;
            int pokusu = 0;
            System.Random r = new System.Random();
            
                double xmin = 10;
                double xmax = 1000;
            
            
            for (int i = 0; i < 10000000; i++)
            {
                double random = r.NextDouble();
                
                //double y = (0.6888 * (random * random)) + (1.6624 * random);
               //double y =   ( 0.6888 * (random * random)) + (0.2848 * random)+ 0.0048;
                //double y = ((0.2739*(random*random*random)) + (0.278 * (random * random)) + (0.4415 * random ));// - 0.0052;
                //double y = (-0.6888 * (random * random)) + (1.6624 * random);
                
                //double y = (1.1364*(random*random*random*random)) - (1.9988*(random*random*random)) + (1.6984*(random*random)) + (0.1574*random) + 0.003;
                
                double y = (0.2795*(random*random*random)) + (0.279*(random*random)) + (0.4415*random);

int result = (int)Math.Round(xmin + ((xmax - xmin) * y));
                
                pokusu++;
                
                //if ( result < xmin )
                //      result = (int)xmin;
                    
                if ( result < xmin || result > xmax )
                {
                    Console.WriteLine( string.Format("Chyba, hodnota mimo: {0}", result) );
                    Console.WriteLine( string.Format("Random = {0}", random ) );
                    Console.WriteLine( string.Format("Y = {0}", y ));
                    break;
                }
                
                if ( result == xmin )
                    lower2++;
                else if ( result == xmax )
                    higher2++;

if (result < ((xmax + xmin) / 2))
                    lower++;
                else
                    higher++;

}
            Console.WriteLine(string.Format("Rozpětí: {0}-{1}", xmin, xmax) );
            Console.WriteLine( string.Format("Pokusů: {0}", pokusu) );
            
            Console.WriteLine(string.Format("nizsi polovina: {0}", lower));
            Console.WriteLine(string.Format("vyssi polovina: {0}", higher));
            
            Console.WriteLine(string.Format("min hodnota: {0}x", lower2));
            Console.WriteLine(string.Format("max hodnota: {0}x", higher2));

}
        
        public static void Main(string[] args)
        {
            Calculate();
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0.08 sec, absolute running time: 0.59 sec, cpu time: 0.42 sec, average memory usage: 18 Mb, average nr of threads: 5