题目：输入某年某月某日，判断这一天是这一年的第几天？
date=input('请输入日期：（xxx/xxx/xxx）')
date1=date.split(sep='/')
# print(date1)
# 判断年份
if int(date1[0])%4==0 and int(date[0])%100 !=0:
month1 = {1: 31, 2: 29, 3: 31, 4: 30, 5: 31, 6: 30, 7: 31, 8: 31, 9: 30, 10: 31, 11: 30, 12: 31}
# for i in range(1,int(date1[1])):
i=int(date1[1])
x = 0
while i>=1:
x=month1[i]+x
i-=1
# print(x)
else:
month2 = {1: 31, 2: 28, 3: 31, 4: 30, 5: 31, 6: 30, 7: 31, 8: 31, 9: 30, 10: 31, 11: 30, 12: 31}
# for i in range(1,int(date1[1])):
i = int(date1[1])
x = 0
while i >= 1:
x = month2[i] + x
i -= 1
# print(x)
print('这天是一年中的第：{}天'.format(x+int(date1[2])))
