using System;

​

namespace _9._Date_birth._Current_age

{

    class Program

    {

        static void Main(string[] args)

        {

            var today = DateTime.Today;

            DateTime birthDate = new DateTime(1989, 09, 10);

            var age = today.Year - birthDate.Year;

            if (birthDate > today.AddYears(-age))

                age--;

            Console.WriteLine(age);

        }

    }

}

// Given a date of birth, calculate the age of a person.

// Input: 10, 09, 1989 

// Output: 29