g0801_0900.s0827_making_a_large_island.Solution

public class Solution extends Object

827 - Making A Large Island.

Hard

You are given an n x n binary matrix grid. You are allowed to change at most one 0 to be 1.

Return the size of the largest island in grid after applying this operation.

An island is a 4-directionally connected group of 1s.

Example 1:

Input: grid = [[1,0],[0,1]]

Output: 3

Explanation: Change one 0 to 1 and connect two 1s, then we get an island with area = 3.

Example 2:

Input: grid = [[1,1],[1,0]]

Output: 4

Explanation: Change the 0 to 1 and make the island bigger, only one island with area = 4.

Example 3:

Input: grid = [[1,1],[1,1]]

Output: 4

Explanation: Can’t change any 0 to 1, only one island with area = 4.

Constraints:

Class Solution

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