Crossing Sequences

using System;
using System.Collections.Generic;
class Program
{
    static void Main()
    {
        long a = long.Parse(Console.ReadLine());
        long b = long.Parse(Console.ReadLine());
        long c = long.Parse(Console.ReadLine());
        long spiralStart = int.Parse(Console.ReadLine());
        long spiralStep = long.Parse(Console.ReadLine());
        List<long> trib = new List<long>() { a, b, c };
        List<long> spiral = new List<long>() { spiralStart };
        bool check = false;

        while (c <= 1000000)
        {
            long ctemp = c;
            c = a + b + c;
            a = b; b = ctemp;
            trib.Add(c);
        }

        for (long poss = 1; spiralStart <= 1000000; poss++)
        {
            for (int m = 0; m < 2; m++)
            {
                long spiralStartTemp = spiralStart + poss * spiralStep;
                spiral.Add(spiralStartTemp);
                spiralStart = spiralStartTemp;
            }
        }

        foreach (var item in trib)
        {
            if (spiral.Contains(item))
            {
                Console.WriteLine(item);
                check = true;
                return;
            }
        }

        if (!check)
        {
            Console.WriteLine("No");

        }
    }
}