using System;
 
namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Leap year tester.");
            Console.WriteLine();
            Console.WriteLine("The year {0} is a leap year = {1}.", -57, IsLeapYear(-57));
            Console.WriteLine("The year {0} is a leap year = {1}.", 0, IsLeapYear(0));
            Console.WriteLine("The year {0} is a leap year = {1}.", 632, IsLeapYear(632));
            Console.WriteLine("The year {0} is a leap year = {1}.", 666, IsLeapYear(666));
            Console.WriteLine("The year {0} is a leap year = {1}.", 999, IsLeapYear(999));
            Console.WriteLine("The year {0} is a leap year = {1}.", 1302, IsLeapYear(1302));
            Console.WriteLine("The year {0} is a leap year = {1}.", 1400, IsLeapYear(1400));
            Console.WriteLine("The year {0} is a leap year = {1}.", 1600, IsLeapYear(1600));
            Console.WriteLine("The year {0} is a leap year = {1}.", 1952, IsLeapYear(1952));
            Console.WriteLine("The year {0} is a leap year = {1}.", 2002, IsLeapYear(2002));
            Console.ReadKey();
        }
 
        static bool IsLeapYear(int year)
        // A year is a leap year if it is divisible by 4.
        // If it is also divisible by 1OO, 
        // it can only be a leap year if it is divisible by 400
        // With the use of the remainder, conditional AND and OR operators
        // the above can be expressed in on line of code.
        {
            if ((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0))
                return true;
            else
                return false;
        }
 
 
    }
}