// Code snippet for counting neighbors,
// accounting for edges and corners

int countNeighbors(int *board, int i, int j, int rows, int cols) {
  int deltaI, deltaJ, n = 0;
  for (deltaI = -1; deltaI <= 1; deltaI++) {
    for (deltaJ = -1; deltaJ <= 1; deltaJ++) {
      if (!(deltaI == 0 && deltaJ == 0))
        n += get(board, i+deltaI, j+deltaJ, rows, cols);
    }
  }
  return n;
}

int get(int *board, int i, int j, int rows, int cols) {
  int newI, newJ;
  newI = (i + rows) % rows;
  newJ = (j + cols) % cols;
  return board[newI * cols + newJ];
}