FirstProgram.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FirstApp
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello world!");

            int n=175;
            //PrintDivisors(n);

            int k = 65;

            
            int v=GCD(n, k);
            //Console.WriteLine(v);


            //for(int x=0; x<2; ++x)
            //    for(int y=0; y<2; ++y)
            //       for(int z=0; z<2; ++z)
            //            for (int w = 0;w < 2; ++w)
            //                Console.WriteLine((x%2 != 0) && (y%2 != 0) || (z%2!=0) && (w % 2 != 0));


            int count = 0;
            for(int x1=0; x1<10; ++x1)
                for(int x2=0; x2<10; ++x2)
                    for (int x3 = 0; x3 < 10; ++x3)
                        for (int x4 = 0; x4 < 10; ++x4)
                            for (int x5 = 0; x5 < 10; ++x5)
                                for (int x6 = 0; x6 < 10; ++x6)
                                    if (x1 + x2 + x3 == x4 + x5 + x6)
                                        count++;
            Console.WriteLine(count);


        }

        static int GCD(int n, int k)
        {
            while (n > 0 && k > 0)
            {
                if (n > k)
                    n = n%k;
                else
                    k = k%n;
            }
            if (n > 0)
                return n;
            return k;
        }

        private static void PrintDivisors(int n)
        {
            int d = 1;
            while (d <= n)
            {
                if (n%d == 0)
                    Console.WriteLine(d);
                d = d + 1;
            }
        }
    }
}