PAT (Advanced Level)1006解

因为最近在刷题库,想想就把本人可以想到的解法写到博客里,作为整理归纳。未必是最优解,还请各位高手多多包涵,能够指点指点。 题目要求 1006 Sign In and Sign Out (25 分) At the beginning of every day, the first person who signs in the computer room will unlock the door,
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