题解 | #牛牛的计划#
牛牛的计划
https://www.nowcoder.com/practice/cf956ceef9f84f7393a0b7284fdbf95a
import sys
from datetime import datetime
start_list = ''.join(input().split())
now_list = ''.join(input().split())
start_date = datetime.strptime(start_list,'%Y%m%d')
now_date = datetime.strptime(now_list,'%Y%m%d')
print('yes' if start_date<=now_date else 'no')
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