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The NOTE (page bottom) is the solution you need.
A path can be made simpler if it contains two consecutive and opposite directions.
ty too ;-)
Oh, i see, ty.
[output] 2D integer arrayRectangular matrix of the same size as matrix each cell of which contains an integer equal to the number of mines in the neighboring cells. Two cells are called neighboring if they share at least one corner.
the image is right for the output. it's not really a minesweeper map. We do not need "bomb" in the output array.
[0,0] and [1,1] should be booms in the second image.
What's wrong with the image? ;-)
Wrong image! Please fix it.
I have the same idea like that.
My idea is using inductive reasoning to prove that n^3+(n-1)^3+...+1 = (n^2*(n+1)^2)/4.