You are given an array of $n$ integers. Your task is to calculate for each window of $k$ elements, from left to right, the minimum total cost of making all elements equal.
You can increase or decrease each element with cost $x$ where $x$ is the difference between the new and the original value. The total cost is the sum of such costs.
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.
Output $n-k+1$ values: the costs.
8 3 2 4 3 5 8 1 2 1
· \n · · · · · · · \n
2 2 5 7 7 1
· · · · · \n