Package g0801_0900.s0827_making_a_large_island

Class Solution

java.lang.Object

g0801_0900.s0827_making_a_large_island.Solution

public class Solution
extends Object

827 - Making A Large Island.<p>Hard</p> <p>You are given an <code>n x n</code> binary matrix <code>grid</code>. You are allowed to change <strong>at most one</strong> <code>0</code> to be <code>1</code>.</p> <p>Return <em>the size of the largest <strong>island</strong> in</em> <code>grid</code> <em>after applying this operation</em>.</p> <p>An <strong>island</strong> is a 4-directionally connected group of <code>1</code>s.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> grid = [[1,0],[0,1]]</p> <p><strong>Output:</strong> 3</p> <p><strong>Explanation:</strong> Change one 0 to 1 and connect two 1s, then we get an island with area = 3.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> grid = [[1,1],[1,0]]</p> <p><strong>Output:</strong> 4</p> <p><strong>Explanation:</strong> Change the 0 to 1 and make the island bigger, only one island with area = 4.</p> <p><strong>Example 3:</strong></p> <p><strong>Input:</strong> grid = [[1,1],[1,1]]</p> <p><strong>Output:</strong> 4</p> <p><strong>Explanation:</strong> Can&rsquo;t change any 0 to 1, only one island with area = 4.</p> <p><strong>Constraints:</strong></p> <ul> <li><code>n == grid.length</code></li> <li><code>n == grid[i].length</code></li> <li><code>1 <= n <= 500</code></li> <li><code>grid[i][j]</code> is either <code>0</code> or <code>1</code>.</li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	largestIsland(int[][] grid)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

largestIsland

public int largestIsland(int[][] grid)