Title: an array of N numbers, and the total number of inverse pairs. The inverse pair is defined as the number of two tuples that exist (I, J) that satisfy the I < J and A[i] > A[j]. Input format: the first line contains an integer, representing an array of items. The next line, including the number of n (n less than 100000), followed by Ai (Ai = 109). Output format: the output one line represents the corresponding answer. Input sample: 5 13254 output sample: 2

Filename	Size	Update
nixudui.cpp	1523	2017-12-28
题目描述.docx	14543	2017-12-28

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