int main()
{

  FILE* in = fopen("3.txt", "r");
  int no_of_rows = 0;
  int no_of_cols = 0;
  int nz = 0;

  fscanf(in, "%d %d %d", &no_of_rows, &no_of_cols, &nz);


  printf("no of rows: %dn", no_of_rows);
  printf("no of cols: %dn", no_of_cols);
  printf("nz values: %dn", nz);

  int* i_idx = (int*)malloc(nz * sizeof(int));
  int* j_idx = (int*)malloc(nz * sizeof(int));
  double* a = (double*)malloc(nz * sizeof(double));
  int i = 0;

  for (i = 0; i < nz; i++)
  {
    fscanf(in, "%d %d %lgn", &i_idx[i], &j_idx[i], &a[i]);
    i_idx[i]--;  /* adjust from 1-based to 0-based */
    j_idx[i]--;
  }

  //double =

  for (i = 0; i < nz; i++)
    printf("%d %d %20.19gn", i_idx[i], j_idx[i], a[i]);

}