6943.Sliding Window Inversions

Time Limit: 1s Memory Limit: 512MB

You are given an array of $n$ integers. Your task is to calculate the number of inversions in each window of $k$ elements, from left to right.

An inversion is a pair of elements where the left element is larger than the right element.

Input Format(From the terminal/stdin)

The first line contains two integers $n$ and $k$ : the number of elements and the size of the window.

Then there are $n$ integers $x_1,x_2,\ldots,x_n$ : the contents of the array.

  • $1 \le k \le n \le 2 \cdot 10^5$
  • $1 \le x_i \le 10^9$

Output Format(To the terminal/stdout)

Print $n-k+1$ values: the numbers of inversions.

Sample Input

Copy
8 3
1 2 3 2 5 2 4 4
 · \n
 · · · · · · · \n

Sample Output

Copy
0 1 1 1 2 0
 · · · · · \n
Source: CSES, Sliding Window Problems, 3223

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