Task04CrossingSequences

namespace Task04CrossingSequences
{
    using System;
    using System.Collections.Generic;

    class Program
    {
        static void Main()
        {
            int firstTribNum = int.Parse(Console.ReadLine());
            int secondTribNum = int.Parse(Console.ReadLine());
            int thirdTribNum = int.Parse(Console.ReadLine());
            int spiralStartNum = int.Parse(Console.ReadLine());
            int spiralStep = int.Parse(Console.ReadLine());
            List<int> tribNums = new List<int>();
            tribNums.Add(firstTribNum);
            tribNums.Add(secondTribNum);
            tribNums.Add(thirdTribNum);
            List<int> spiralNums = new List<int>();
            int nextTrib = firstTribNum + secondTribNum + thirdTribNum;
            while (nextTrib <= 1000000)
            {
                tribNums.Add(nextTrib);
                nextTrib = tribNums[tribNums.Count - 1] +
                    tribNums[tribNums.Count - 2] +
                    tribNums[tribNums.Count - 3];
            }

            while (spiralStartNum <= 1000000)
            {
                spiralNums.Add(spiralStartNum);
                spiralStartNum += spiralStep;
            }

            bool numberFounded = false;
            int count = -1;
            int turn = 0;
            for (int i = 0; i < spiralNums.Count; i++)
            {

                for (int a = 0; a < turn; a++)
                {
                    i++;
                }

                count++;
                if (tribNums.Contains(spiralNums[i]))
                {
                    numberFounded = true;
                    Console.WriteLine(spiralNums[i]);
                    break;
                }

                if (count == 2)
                {
                    turn++;
                    count = 0;
                }
            }

            if (!numberFounded)
            {
                Console.WriteLine("No");
            }
        }
    }
}