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The list of 57 days of winter vacation in a university in Henan involves 49 universities

Original title: real name envy! 57 days of winter vacation in a university in Henan Province

4hw.com.cn recently, Henan Provincial Department of Education released the "2020 Henan Colleges and universities winter vacation length list", the list involves 49 colleges and universities, the vacation time from nearly two months to less than a month. Among them, the university with the longest vacation time has 57 days, while the shortest one is only 28 days. How many days does your school have for winter vacation?