Практикум 4, задание 7, номер 11

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

namespace mainSolution
{
    public class MyException : Exception
    {
        public MyException(string messege) : base(message: messege + "\n\n\n Exception founded by Decibit\n\n\n") { }
        public MyException() : base()
        {

        }
        public void Messsage()
        {
            Console.WriteLine("\n\n\n\n\n\n Invalid number, please enter a number from 1 to 12 \n\n\n\n\n\n");
        }


    }
    class Input
    {
        private static IEnumerator<string> getin()
        {
            while (true)
                foreach (string s in Console.ReadLine().Split().Where(x => x.Length > 0))
                    yield return s;
        }

        private IEnumerator<string> inp = getin();

        public string GetString() { inp.MoveNext(); return inp.Current; }
        public int GetInt() { return int.Parse(GetString()); }
        public long GetLong() { return long.Parse(GetString()); }
        public double GetDouble() { return double.Parse(GetString()); }
    }

    static class Program
    {
        static public Input cin = new Input();

        static int getSum(string s)
        {
            int res = 0;
            foreach (var v in s)
            {
                res += v - '0';
            }
            return res;
        }

        static void Main(string[] args)
        {
            long n = cin.GetLong();
            int sum = getSum(Convert.ToString(n));
            int c = cin.GetInt();
            int d = cin.GetInt();
            while (sum % c != 0 || sum % d != 0)
            {
                n++;
                sum = getSum(Convert.ToString(n));
            }
            Console.WriteLine(n);
        }

    }
}