using System;

using System.Diagnostics;

​

public class Program

{

    public static void Main()

    {

        Stopwatch stopwatch = new Stopwatch();

        int n=1000;

        int rez=0;

        stopwatch.Start();

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

        {

            for(int j=0;j<n;j++)

            {

                rez=i*j;

            }

        }

        stopwatch.Stop();

        Console.WriteLine((stopwatch.Elapsed));

    }

​

}