#1212. 逆序对
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ID: 1212
Type: Objective
Tried: 43
Accepted: 14
Difficulty: 5
Uploaded By:
逆序对
1、对于给定的序列{An}，我们把(i, j)称为逆序对当且仅当i < j且Ai> Aj。那么序列1, 7, 2, 3, 6,5, 4的逆序对数为（{{ input(1) }}）个