#-*- coding:utf-8 -*-
try:
year = int(raw_input('请输入年份(如2008): '))
except:
print '请输入正确的年份'
exit()
is_leap = false
if year % 100 == 0 and year % 400 == 0:
is_leap = true
elif year % 100 != 0 and year % 4 == 0:
is_leap = true
if is_leap:
print '%d年是闰年！' % year
else:
print '%d年不是闰年！' % year