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Biggest Island (easy)

**Problem Statement**

Given a 2D array (i.e., a matrix) containing only 1s (land) and 0s (water), find the biggest island in it. Write a function to return the area of the biggest island.

An **island** is a connected set of 1s (land) and is surrounded by either an edge or 0s (water). Each cell is considered connected to other cells horizontally or vertically (not diagonally).

**Example 1**

**Input**: matrix =

**Output**: 5

**Explanation**: The matrix has three islands. The biggest island has 5 cells .

**Constraints:**

`m == matrix.length`

`n == matrix[i].length`

`1 <= m, n <= 50`

`matrix[i][j] is '0' or '1'.`

## Try it yourself

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Python3

Python3

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