问题描述：
英语翻译
Given an integer array A,which contains N integers.Please calculate the sum of f[i].Here,f[i] means the number of integers strictly less than A[i] in A.
输入
There are several cases.For each case,the first line has an integer N,then follows N integers in the second line (1
Given an integer array A,which contains N integers.Please calculate the sum of f[i].Here,f[i] means the number of integers strictly less than A[i] in A.
输入
There are several cases.For each case,the first line has an integer N,then follows N integers in the second line (1
问题解答：
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