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https://missterhao.me/2018/12/20/%e3%80%90cpe%e3%80%91uva-11321-sort-sort-and-sort-%e4%b8%80%e9%a1%86%e6%98%9f-by-c/
【CPE】UVA 11321 Sort! Sort!! And Sort!!! 一顆星 by C++