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    @ 2025-6-2 20:11:47

    第十二题答案为A 如{2,1,1},交换2和第一个1后变为{1,2,1},虽然总逆序对数有所减少,但相邻逆序对数不变

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    ID
    50
    Time
    1000ms
    Memory
    256MiB
    Difficulty
    1
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