# -*- coding:utf-8 -*-
year =int(input("请输入一个年份:"))
if (year % 4) == 0:
if (year % 100) == 0:
if (year % 400) == 0:
print("是闰年")
else:
print("不是闰年")
else:
print("不是闰年")
else:
print("不是闰年")# -*- coding:utf-8 -*-
year =int(input("请输入一个年