#include <stdio.h>
#include <stdlib.h>


#define MAX_SIZE 100

// Returns the sum of all elements on the border of a (size x size) 2D array
int sum_border(int size, int array[MAX_SIZE][MAX_SIZE]) {
    // PUT YOUR CODE HERE (change the next line!) 
    return -1;
}

// This is a simple main function which could be used
// to test your sum_border function.
// It will not be marked.
// Only your sum_border function will be marked.
int main(void) {
    // In the below test array, the sum of the border is 16
    // If you modify this array, that sum will change
    int test_array[MAX_SIZE][MAX_SIZE] = {
        {1, 1, 1, 1, 1},
        {1, 1, 1, 1, 1},
        {1, 1, 1, 1, 1},
        {1, 1, 1, 1, 1},
        {1, 1, 1, 1, 1}
    };

    // If you modify the above array for your own testing, 
    // you may also need to modify the size variable below accordingly
    int size = 5;
    
    printf("The sum of all the border elements is: %d\n", 
            sum_border(size, test_array));

    return 0;
}