import datetime
def date_delta(start, end):
# 转换为标准时间
start = datetime.datetime.strptime(start,"%Y-%m-%d %H:%M:%S")
end = datetime.datetime.strptime(end,"%Y-%m-%d %H:%M:%S")
# 获取时间戳
timeStamp_start = start.timestamp()
timeStamp_end = end.timestamp()
return timeStamp_end - timeStamp_start
start = input() # sys.stdin.readline()
end = input() # sys.stdin.readline()
print(date_delta(start, end))
2020-04-24