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🧙‍♂️(array): 463. 岛屿的周长补充 title

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Original file line number	Diff line number	Diff line change
`@@ -1683,7 +1683,7 @@ class Solution:`
`1683`	`1683`	`return res`
`1684`	`1684`	```
`1685`	`1685`
`1686`		`-### 解法二:`
	`1686`	`+### 解法二:算周长`
`1687`	`1687`
`1688`	`1688`	`因为岛屿内部没有湖,所以本质上就是求一个矩形的周长。所以只要求出岛屿的上侧(或下侧)与左侧(或右侧)的长度和即可,再将该长度乘以 2。`
`1689`	`1689`

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