рождена дата

class Solution
{
    public static void Main()
    {
        int[] bdayDateArr = Console.ReadLine().Split(' ', 2).Select(Int32.Parse).ToArray();
        int[] nowDateArr = Console.ReadLine().Split(' ', 3).Select(Int32.Parse).ToArray();

        int nowDate = nowDateArr[0];
        int nowMonth = nowDateArr[1];
        int nowYear = nowDateArr[2];
        int bdayDate = bdayDateArr[0];
        int bdayMonth = bdayDateArr[1];
        int bdayYear = nowYear;

        if (bdayDate == 29
         && bdayMonth == 2)
        {
            // calc next leap year
            while (!(bdayYear % 4 == 0 || bdayYear % 100 != 0 && bdayYear % 4 == 0))
            {
                bdayYear++;
            }
        }

        // Constraints
        if (nowYear is < 1920 or > 3000
            || nowMonth is < 1 or > 12
            || nowDate < 1 || nowDate > DateTime.DaysInMonth(nowYear, nowMonth)
            || bdayMonth is < 1 or > 12
            || bdayDate < 1 || bdayDate > DateTime.DaysInMonth(bdayYear, bdayMonth))
        {
            return;
        }

        DateTime now = new(nowYear, nowMonth, nowDate);
        DateTime birthday = new(bdayYear, bdayMonth, bdayDate);
        if (now > birthday)
        {
            birthday = birthday.AddYears(1);
        }
        int daysUntilBirthday = (birthday - now).Days;
        Console.WriteLine(daysUntilBirthday);
    }
}