using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Choose the year.");

        int year = int.Parse(Console.ReadLine());

        GetsSundays(year);

    }

    //*13. Write a program to select all the Sundays of a specified year and display their dates

    // Output:

    //2020-01-05

    //2020-01-12 

    //2020-01-19

    static void GetsSundays(int year)

    {

        DateTime firstDay = new DateTime(year, 1, 1);

        for(int i = 1; i < 366; i++)

        {

            DateTime newDay = firstDay.AddDays(i);

​

            if(newDay.DayOfWeek.ToString() == "Sunday")

            {

                Console.WriteLine(newDay.ToShortDateString());

            }

        }

    }

}