# 日期计算器
# import datetime
#
# pre = datetime.datetime(year=1999, month=10, day=12)
# cur = datetime.datetime(year=2023, month=10, day=4)
# print(cur - pre)

import datetime as dt

pre = dt.datetime(year=1999, month=10, day=12)
cur = dt.datetime(year=2023, month=10, day=4)
print(cur - pre)