using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace ConsoleApp12

{

    public class Program

    {

        public static void Main(string[] args)

        {

            string s = DateTime.Now.ToString("yyyy-MM-dd");

            var dict = new Dictionary<string, string>()

            {

                { $"{s.Split('-')[0].Count()}", "%Y" },

                { $"{s.Split('-')[1].Count()}", "%M" },

                { $"{s.Split('-')[2].Count().ToString().PadRight(3, ' ')}", "%D" }

            };

​

            //Console.WriteLine(s.Split('-')[2].ToString().PadRight(3, ' ').Count());

            StringBuilder sb = new StringBuilder();

            foreach (var item in dict)

            {

                //Console.Write(string.Join("-", item.Value));

                sb.Append('-').Append(item.Value);

            }

​

            Console.WriteLine(DateTime.Now.ToString("yyyy-MM-dd"));

            Console.Write(sb.ToString().TrimStart('-'));

            Console.ReadLine();

        }

​

    }

}