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

void sum_inner_neighbors(int x, int y, int *val) 
{
   for (int i = 1; i < x - 1; i++) {
      for (int j = 1; j < y - 1; j++) {
         int up = val[(i-1)*x + j];
         int down = val[(i+1)*x + j];
         int left = val[(i*x) + (j-1)];
         int right = val[(i*x) + (j+1)];
         int sum = up + down + left + right;
//         printf("Sum (for %d,%d): %d\n", i, j, sum);
     }
  }
}

int main(int argc, char **argv)
{

   int x = atoi(argv[1]);
   int y = atoi(argv[2]);

   int val[x * y];

   for (int i = 0; i < x; i++) {
      for (int j = 0; j < y; j++) {
         val[i*x + j] = i * j;
      }
   }

   sum_inner_neighbors(x, y, val);

   return 0;

}