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贴组数据……答案是2……虽然偶用ac的程序跑出来是1……~~~~(>_<)~~~~20 15 19 18 8 20 1 20 11 18 4 9 7 4 5 14 11 5 15 5 3 6 12 14 2 13 4 8 3 18 4 15 2 11 19 16 17 8 16 10 Followed by:
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