Compilare: user.cpp: In function ‘int main()’: user.cpp:154:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&n); ^ user.cpp:157:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d " , &tip, &p, &w); ^ user.cpp: In function ‘Treap* erase(Treap*, int, int)’: user.cpp:91:27: warning: ‘aux’ may be used uninitialized in this function [-Wmaybe-uninitialized] return balance(aux); ^