Avoid The Lakes (深搜dfs)
阿新 • • 發佈:2019-01-25
Farmer John's farm was flooded in the most recent storm, a fact only aggravated by the information that his cows are deathly afraid of water. His insurance agency will only repay him, however, an amount depending on the size of the largest "lake" on his
farm.
The farm is represented as a rectangular grid with N