P9843 [ICPC 2021 Nanjing R] Paimon Sorting
Description
Paimon just invents a new sorting algorithm which looks much like $\textit{bubble sort}$, with a few differences. It accepts a $1$-indexed sequence $A$ of length $n$ and sorts it. Its pseudo-code is shown below.
```cpp
// The Sorting Algorithm
SORT(A)
for i from 1 to n // n is the number of elements if A
for j from 1 to n
if a[i] < a[j] // a[i] is the i-th element in A
Swap a[i] and a[j]
```
If you don't believe this piece of algorithm can sort a sequence it will also be your task to prove it. Anyway here comes the question:
Given an integer sequence $A = a_1, a_2, \cdots, a_n$ of length $n$, for each of its prefix $A_k$ of length $k$ (that is, for each $1 \le k \le n$, consider the subsequence $A_k = a_1, a_2, \cdots, a_k$), count the number of swaps performed if we call $\text{SORT}(A_k)$.
Input Format
There are multiple test cases. The first line of the input contains an integer $T$ indicating the number of test cases. For each test case:
The first line contains an integer $n$ ($1 \le n \le 10^5$) indicating the length of the sequence.
The second line contains $n$ integers $a_1, a_2, \cdots, a_n$ ($1 \le a_i \le n$) indicating the given sequence.
It's guaranteed that the sum of $n$ of all test cases will not exceed $10^6$.
Output Format
For each test case output one line containing $n$ integers $s_1, s_2, \cdots, s_n$ separated by a space, where $s_i$ is the number of swaps performed if we call $\text{SORT}(A_i)$.
Please, DO NOT output extra spaces at the end of each line or your solution may be considered incorrect!