螺旋区域
Spiral Region
题目详情
Shade some cells in the grid above such that the set of shaded cells is connected, has 90-degree rotational symmetry about its center, and contains the same number of shaded cells in each outlined region.
The answer to this puzzle is the smallest possible product of the areas of the connected groups of empty squares in the completed grid.
解析
Original Explanation
The smallest product we were able to find is 1203200, which results from the shading shown above. Congrats to those of you who found it!