- Prepare
- Algorithms
- Search
- Connected Cells in a Grid

# Connected Cells in a Grid

# Connected Cells in a Grid

Consider a matrix where each cell contains either a or a . Any cell containing a is called a *filled* cell. Two cells are said to be *connected* if they are adjacent to each other horizontally, vertically, or diagonally. In the following grid, all cells marked `X`

are connected to the cell marked `Y`

.

```
XXX
XYX
XXX
```

If one or more filled cells are also connected, they form a *region*. Note that each cell in a region is connected to zero or more cells in the region but is not necessarily directly connected to all the other cells in the region.

Given an matrix, find and print the number of cells in the largest *region* in the matrix. Note that there may be more than one region in the matrix.

For example, there are two regions in the following matrix. The larger region at the top left contains cells. The smaller one at the bottom right contains .

```
110
100
001
```

**Function Description**

Complete the *connectedCell* function in the editor below.

connectedCell has the following parameter(s):

- *int matrix[n][m]*: represents the row of the matrix

**Returns**

- *int:* the area of the largest region

**Input Format**

The first line contains an integer , the number of rows in the matrix.

The second line contains an integer , the number of columns in the matrix.

Each of the next lines contains space-separated integers .

**Constraints**

**Sample Input**

```
STDIN Function
----- --------
4 n = 4
4 m = 4
1 1 0 0 grid = [[1, 1, 1, 0], [0, 1, 1, 0], [0, 0, 1, 0], [1, 0, 0, 0]]
0 1 1 0
0 0 1 0
1 0 0 0
```

**Sample Output**

```
5
```

**Explanation**

The diagram below depicts two regions of the matrix. Connected regions are filled with X or Y. Zeros are replaced with dots for clarity.

```
X X . .
. X X .
. . X .
Y . . .
```

The larger region has cells, marked `X`

.