Leetcode 封閉島嶼解題
Leetcode 封閉島嶼解題
No. 1254. Number of Closed Islands
題目Given a 2D grid consists of 0s (land) and 1s (water). An island is a maximal 4-directionally connected group of 0s and a closed island is an island totally (all left, top, right, bottom) surrounded by 1s.
Return the number of closed...
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