вложенные циклы_контестер_1.8

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

namespace ConsoleApplication
{
    class Program
    {
        static long NOK(int a, int b, int c, int max)
        {
            long result = calcNok(a, b);
            result = calcNok(result, c);
            return result;
        }

        static long calcNok(long num1,long num2)
        {
            return num1*num2/calcNod(num1,num2);
        }

        static long calcNod(long a,long b)
        {
            return b == 0 ? a : calcNod(b, a % b);
        }
        static void Main(string[] args)
        {
            StreamReader fin = new StreamReader("input.txt");
            string[] numb = fin.ReadLine().Split(' ');
            fin.Close();
            int a = int.Parse(numb[0]);
            int b = int.Parse(numb[1]);
            int c = int.Parse(numb[2]);
            int max;
            if ((a > b) && (a > c))
                max = a;
            else max = b > c ? b : c;
            StreamWriter fout = new StreamWriter("output.txt");
            fout.Write("{0}", NOK(a, b, c, max));
            fout.Close();
        }
    }
}