unsigned long some_heavy_stuff(int lima, int limb) {
  unsigned long result = 0;
  int i, j = 0;
  int sum = 0;
  for (i = 0; i < lima; i++) {
    sum = 0;
    for (j = 0; j < limb; j++) {
      sum += i + j;
    }
    result += sum;
  }
  return result;
}

unsigned long lesser_heavy_stuff(int lima, int limb) {
  unsigned long result = 0;
  int i, j = 0;
  for (i = 0; i < lima; i++) {
    // Optimize sum of first n numbers
    // Factorize outer index
    result += (i * limb) + ((limb - 1) * limb) / 2;
  }
  return result;
}