Question 11
Leo scrambles square-grid pictures with two steps. In H, row 1 does not move, row 2 shifts right 1 cell, row 3 right 2, and row n right n−1; cells crossing the right edge wrap to the left in order. In V, columns similarly shift downward: column 1 by 0, column 2 by 1, and so on, wrapping from bottom to top. The source 3 × 3 example applies H then V.
What is obtained by applying V then H to this 1000 × 1000 image, whose top-right and bottom-left quarters are gray?
What is obtained by applying V then H to this 1000 × 1000 image, whose top-right and bottom-left quarters are gray?