Works fine for sample test case 0 and sample test case 34. All other cases failed. Can someone help me please? Thanks.!`

for (int i = 0; i < T; i++) {

for (unsigned long long j = 1;; j++)
{
  if (j * j >= case1[i].Num)
    break;
  sum = 0;
  count = 0;
  for (int k = j;; k = k + case1[i].dif)
  {
    sum = sum + k * k;
    count++;
    if (sum >= case1[i].Num)
      break;
    sprintf(str1, "%llu", sum);
    for (p = 0, q = strlen(str1); str1[p] != '\0'; p++, q--)
    {
      str2[q - 1] = str1[p];
    }
    str2[p] = '\0';

    if (strcmp(str1, str2) == 0 && count >= 2)
    {
      for (unsigned long long l = 0; l < r; l++)
      {
        if (sum == sums[i])
        {
          flag = 0;
        }
      }
      if (flag)
      {
        Lsum = Lsum + sum;
        sums[r] = sum;
        r++;
      }
    }
  }
}
printf("%llu\n", Lsum);
Lsum = 0;
    }

}

return 0; }