In chess, in the way of the horse and cart similar to chess, that is, the saying goes "walking day", as shown in the following figure is horse chess (k) in one can reach the grid (black Plaid was able to reach the location). Existing 200*200 the size of the chess board, only one horse in the Board, given the current position of the horse (s) and destination (t), and hands at least need to jump to from the current position to the target location.

tmc.cpp

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