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15MS过太神了吧？这题不就插头DP三进制么？怎么我的就那么慢开始是超时，优化成队列的还超时，打表（对三进制的操作打表）又超空间，后来只好半打表，半计算，才勉强通过，汗颜了。。。用4进制位运算的我没试，难道真的那么快？ Followed by:
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