Number Of Islands

easy
1. You are given a 2d array where 0's represent land and 1's represent water. 
     Assume every cell is linked to it's north, east, west and south cell.
2. You are required to find and count the number of islands.

Input Format

Input has been managed for you

Output Format

Number of islands

Constraints

None

Notice

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2. Think of a solution approach, then try and submit the question on editor tab.
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Example

Input
8
8
0 0 1 1 1 1 1 1
0 0 1 1 1 1 1 1
1 1 1 1 1 1 1 0
1 1 0 0 0 1 1 0
1 1 1 1 0 1 1 0
1 1 1 1 0 1 1 0
1 1 1 1 1 1 1 0
1 1 1 1 1 1 1 0
Output
3
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