Compilare: main.cpp: In function 'int main()': main.cpp:93:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&m); ^ main.cpp:95:43: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&v_init[i].first); ^ main.cpp:107:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&cer); ^ main.cpp:109:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&poz); ^ main.cpp:114:43: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&p,&q,&k); ^ main.cpp: In function 'void update_aint(int, int, int, int)': main.cpp:15:26: warning: 'mid' may be used uninitialized in this function [-Wmaybe-uninitialized] for (int i=poz;i<=n;i=i+(i&(-i))) ~^~~~~~~~~~~ main.cpp:45:9: note: 'mid' was declared here int mid,l,r; ^~~