AA往返改签费用问题# Money - 海外理财
l*c
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matrix, 1 or 0, find the maximum connected area of 1,
connected means
(x, y) is 1, and (x -1, y) or ( x+1, y) or (x, y+1) or (x, y-1) is one.
(x+1, y+1) or (x-1, y-1) is not considered connected or not.
connected means
(x, y) is 1, and (x -1, y) or ( x+1, y) or (x, y+1) or (x, y-1) is one.
(x+1, y+1) or (x-1, y-1) is not considered connected or not.
