using System;
using System.Diagnostics;

namespace RiderTestApp
{
    internal class Program
    {
        public static double Round(double d)
        {
            return Math.Round(d);
        }

        public static double RoundWithPrecision(double d)
        {
            return Math.Round(d, 0);
        }

        public static double Floor(double d)
        {
            return Math.Floor(d + 0.5);
        }

        private static void TestRound(int n)
        {
            var s = new Stopwatch();

            double d = 0;

            s.Start();

            for (var i = 0; i < n; i++)
            {
                d += Round(3.5);
            }

            s.Stop();

            Console.WriteLine("Round - d: " + d + ", Time: " + s.ElapsedMilliseconds);
        }

        private static void TestRoundWithPrecision(int n)
        {
            var s = new Stopwatch();

            double d = 0;

            s.Start();

            for (var i = 0; i < n; i++)
            {
                d += RoundWithPrecision(3.5);
            }

            s.Stop();

            Console.WriteLine("RoundWithPrecision - d: " + d + ", Time: " + s.ElapsedMilliseconds);
        }

        private static void TestFloor(int n)
        {
            var s = new Stopwatch();

            double d = 0;

            s.Start();

            for (var i = 0; i < n; i++)
            {
                d += Floor(3.5);
            }

            s.Stop();

            Console.WriteLine("Floor - d: " + d + ", Time: " + s.ElapsedMilliseconds);
        }

        public static void Main()
        {
            Console.WriteLine(Environment.OSVersion);
            Console.WriteLine(Type.GetType("Mono.Runtime") == null ? "MS" : "Mono");
            Console.WriteLine(Environment.Version);

#if DEBUG
            Console.WriteLine("Mode=Debug");
#else
            Console.WriteLine("Mode=Release");
#endif

            Console.WriteLine();

            const int n1 = 1000000;

            TestRound(n1);
            TestRoundWithPrecision(n1);
            TestFloor(n1);

            Console.WriteLine();

            const int n2 = n1 * 10;

            TestRound(n2);
            TestRoundWithPrecision(n2);
            TestFloor(n2);

            Console.WriteLine();

            const int n3 = n2 * 10;

            TestRound(n3);
            TestRoundWithPrecision(n3);
            TestFloor(n3);
        }
    }
}