Crossing Rows Tribonacci and Spiral

using System;

public class Program
{
	public static void Main()
	{
	   int tribonacciFirstNum = int.Parse(Console.ReadLine());
		int tribonacciSecondNum = int.Parse(Console.ReadLine());
		int tribonacciThirdNum = int.Parse(Console.ReadLine());
		int begSpiral = int.Parse(Console.ReadLine());
		int stepSpiral = int.Parse(Console.ReadLine());



		int tribonacciCurrentNum = tribonacciFirstNum + tribonacciSecondNum + tribonacciThirdNum;

		int spiralCurrNum = begSpiral;
		int spiralStepMul=1;
		int stepPosition =1;

		while (tribonacciCurrentNum <= 1000000 && spiralCurrNum <=1000000)
		{
			if (spiralCurrNum == tribonacciCurrentNum || spiralCurrNum == tribonacciFirstNum || spiralCurrNum == tribonacciSecondNum || spiralCurrNum == tribonacciThirdNum)
			{
				Console.WriteLine(spiralCurrNum);
				break;
			}
			else if (tribonacciCurrentNum < spiralCurrNum)
			{
				tribonacciCurrentNum = tribonacciFirstNum + tribonacciSecondNum + tribonacciThirdNum;
		        tribonacciFirstNum = tribonacciSecondNum;
		        tribonacciSecondNum = tribonacciThirdNum;
		        tribonacciThirdNum = tribonacciCurrentNum;
			}
			else
			{
				spiralCurrNum += spiralStepMul*stepSpiral;
				if (stepPosition %2==0)
				{
					spiralStepMul++;
				}
				stepPosition++;
			}
		}
		if (tribonacciCurrentNum > 1000000 || spiralCurrNum > 1000000)
		{
			Console.WriteLine("No");
		}
	}
}