using System;
public class Program
{
public static void Main()
var val = CheckDate(1,1,2019);
Console.WriteLine(val);
}
const int max_year = 2100;
const int min_year = 1900;
static bool CheckDate(int d, int m, int y)
if (d < 1 || d > 31)
if (m < 1 || m > 12)
if (y < min_year || y > max_year)
return false;
else
return true;