using System;

​

namespace _11_s__date_of_1st_Mday_of_given_week

{

    class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("Year: ");

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

            Console.WriteLine("Week number: ");

            var weekNo = int.Parse(Console.ReadLine());

​

            DateTime date = new DateTime(2015, 1, 1).AddDays(weekNo * 7);

            var result = date.AddDays(-(int)date.DayOfWeek + 1);

            Console.WriteLine(result.ToShortDateString());

        }

    }

}

// Write a program to find the date of the first Monday of a given week

// Input  : 2015, 50

// Output : Mon Dec 14 00:00:00 2015