I got completely comfused in the editorial of DIV2 E.

let it be number $$$y$$$. Then it is clear that all bits from $$$w$$$ will be included in the answer, then we make a new pair $$$(x'_i, y'_i)$$$ = $$$(x_i - w, y_i - w)$$$

What is $$$w$$$? Where did the $$$w$$$ come from? Are you meaning $$$y$$$ ?

Iterate over bit $$$i$$$ and similarly to the case $$$x = 0$$$ consider the same cases, but for the array $$$y'$$$. Also, take into account that the bit occurs in $$$W$$$.

I think this sentence is written for people who have already known how to solve this problem. It is completely unreadable and meaningless.

Don't write editorials for MIKE. Please, write something understandable.

Please always remember, people who read your editorials do not know how to solve this problem, and not all readers can understand it as easily as tourist.

UPD1: It seems that the writter has modified the editorial and the first issue has been fixed.