To solve this problem, you need to follow these steps:

1. First, read the size of the matrix from the input. The first line of the input gives you two integers which represent the number of rows and columns of the matrix.

2. Then, read the elements of the matrix. The elements are given in the input as integers, based on the size of the matrix.

3. Now, you need to calculate the sum of the boundary elements of the matrix. The boundary elements are the elements that are located on the first row, the last row, the first column, and the last column.

4. To do this, you can initialize a variable, say `sum`, to 0. Then, iterate over the elements of the matrix. If an element is a boundary element, add its value to `sum`.

5. The condition to check if an element is a boundary element is as follows: an element is a boundary element if its row index is 0 or `row-1` (where `row` is the number of rows of the matrix), or if its column index is 0 or `col-1` (where `col` is the number of columns of the matrix).

6. After iterating over all the elements of the matrix, `sum` will hold the sum of the boundary elements.

7. Finally, print `sum`. This is the output of the problem.

For example, if the input is:

```
3 3
1 1 1
1 1 1
1 1 1
```

The output will be `8`, because the boundary elements are the eight `1`s that are located on the borders of the matrix.

Question

To solve this problem, you need to follow these steps:

1. First, read the size of the matrix from the input. The first line of the input gives you two integers which represent the number of rows and columns of the matrix.

2. Then, read the elements of the matrix. The elements are given in the input as integers, based on the size of the matrix.

3. Now, you need to calculate the sum of the boundary elements of the matrix. The boundary elements are the elements that are located on the first row, the last row, the first column, and the last column.

4. To do this, you can initialize a variable, say `sum`, to 0. Then, iterate over the elements of the matrix. If an element is a boundary element, add its value to `sum`.

5. The condition to check if an element is a boundary element is as follows: an element is a boundary element if its row index is 0 or `row-1` (where `row` is the number of rows of the matrix), or if its column index is 0 or `col-1` (where `col` is the number of columns of the matrix).

6. After iterating over all the elements of the matrix, `sum` will hold the sum of the boundary elements.

7. Finally, print `sum`. This is the output of the problem.

For example, if the input is:

```
3 3
1 1 1
1 1 1
1 1 1
```

The output will be `8`, because the boundary elements are the eight `1`s that are located on the borders of the matrix.

Knowee AI · Accepted Answer