using System;
class Sample
{
public static void Main()
{
int July = 7;
int Feb = 2;
int daysInJuly = System.DateTime.DaysInMonth(2001, July);
int daysInFeb = System.DateTime.DaysInMonth(1998, Feb);
int daysInFebLeap = System.DateTime.DaysInMonth(1996, Feb);
}
}