temp=input('请输入一个年份')
while not temp.isdigit():
    temp=input("抱歉，您输入有误，请重新输入一整数:")
year=int(temp)
if year/400==int(year/400):
    print(temp+'是闰年!')
else:
        if (year/4==int(year/4)) and (year/100!=int(year/100)):
            print(temp+'是闰年!')
        else:
            print(temp+'是平年!')