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Can you explain the process of input for -1 for both prevX and prevY? x = -1 an...
Alfonso Vieyra
Sep 9, 2022
Can you explain the process of input for -1 for both prevX and prevY? x = -1 and y = -1?
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Design Gurus3 years ago
We should avoid visiting the previous cell. Because going back to the cell from where we came, will result in a cycle, which is not correct.
At start, we set prevX and prevY to -1, as there is no previous cell. This will make the following checks true:
x + 1 != prevX ...
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