ACM: 强化训练-Inversion Sequence-线段树 or STL·vector

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ACM: 强化训练-Inversion Sequence-线段树 or STL·vector

Inversion Sequence Time Limit:2000MS Memory Limit:262144KB 64bit IO Format:%lld & %llu Description For sequence i1, i2, i3, … , iN, we set aj to be the number of members in the sequence which are prior to j and greater to j at the same time.…

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