# -*- coding: UTF-8 -*-

# Filename : test.py

# author by : www.dida100.com

year = int(input("输入一个年份: "))

if (year % 4) == 0:

   if (year % 100) == 0:

       if (year % 400) == 0:

           print("{0} 是闰年".format(year))   # 整百年能被400整除的是闰年

       else:

           print("{0} 不是闰年".format(year))

   else:

       print("{0} 是闰年".format(year))       # 非整百年能被4整除的为闰年

else:

   print("{0} 不是闰年".format(year))