Isn't the first example wrong?

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    Same question here, it seems that you have already figured it out. So in the first example, why the output [0][2] remains "E" instead of "1"?
    Thanks in advance.

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    @jp1994 because that block you won't be able to visit when you click [3,0]. the number blocks surrounding it is where you stop propagating, so [0,2] remains untouched and unchanged.

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