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Graph_t* readgraph(FILE *in){
  int dest, w, k;
  double weight;
  char buf[MAX_BUF];
  int count = -1;
  int offset;

  fscanf(in, "%d %d", &w, &k);
  Graph_t* graf = initgraph(k, w);

  while (fgets(buf, MAX_BUF, in) != NULL){
    char *data = buf;
    while (sscanf(data, "%d :%lf%n", &dest, &weight, &offset) == 2)
    {
      Node_t* node = malloc(sizeof(*node));
      node->dest = dest;
      node->weight = weight;
      node->next = graf->adjlist[count];
      graf->adjlist[count] = node;
      data += offset;
    }
    count++;
  }
  return graf;
}