year = int(input('Enter a year: '))
if year % 4 == 0:
    if year % 100 == 0:
        if year % 400 == 0:
            print(' ')
            print('The year', year, 'is a leap year')
        else:
            print(' ')
            print('The year', year, 'is not a leap year')
    else:
        print(' ')
        print('The year', year, 'is a leap year')
else:
    print(' ')
    print('The year', year, 'is not a leap year')