I always surprise that why in mostly question only single test case is provided with explanation. Like this question. I am not able to get any idea with only single example.

TSP is a classical DP problem ( bitMask techniqe ) , but can any one explain the input format to me please ?

If we have only one line (or equaly column) of length >= 3 - there is no way of traveling through all cells and get back visiting each cell only once. What should be an answer in this case?

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