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May 16th, 2018
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  1. void usun(struct lista **head, int x){
  2. if(*head){
  3. struct lista *walker=(*head);
  4. while(walker){
  5. if(walker->key==x){
  6. if(walker->prev==NULL){
  7. (*head)=walker->next;
  8. walker->next->prev=NULL;
  9.  
  10. free(walker);
  11.  
  12. }else if(walker->next==NULL){
  13. walker->prev->next=NULL;
  14. free(walker);
  15. break;
  16. free(walker);
  17. }else if(walker->next==NULL && walker->prev==NULL){
  18. free(walker);
  19. free(head);
  20. break;
  21.  
  22.  
  23.  
  24. }else
  25. walker->prev->next=walker->next;
  26. walker->next->prev=walker->prev;
  27.  
  28. break;
  29.  
  30. }
  31. walker=walker->next;
  32. }
  33. free(walker);
  34. };
  35. }
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