Is a year a leap year?
Just a reminder: leap years are the years that are either divisible by 4 and not divisible by 100, or divisible by 400 (for example, the year 2000 is a leap year, but the year 2100 is not).
The program should work for the years 1900 ≤ n ≤ 3000.
Output "Leap" (case-sensitive) if the year is a leap, otherwise print "Regular".