实现今天是今年的第几天

month_1 = [31,28,31,30,31,30,31,30,31,31,30,31]
year,month,day = int(input('输入年')), int(input('输入月')), int(input('输入日'))

j = 0
def days():
　　 """实现对应月份的天数相加"""
    global j
    for i in range(1, month):
        if i < month:
            j += month_1[i-1]
    j += day
# 判断闰年，闰年对应月份值增加一天
if year % 400 == 0 or year % 100 != 0 and year % 4 == 0:
    days()
    if month > 2:
        j += 1
    print(f'今天是今年的第{j}天')
else:
    days()
    print(f'今天是今年的第{j}天')