//is 'n' a leap year
fn isLeapYear(n: Int) {
	if (n % 400 == 0) return true;
	if (n % 100 == 0) return false;
	return n % 4 == 0;
}

{
	print isLeapYear(1999);
}

{
	print isLeapYear(2000);
}

{
	print isLeapYear(2004);
}