Compilare: user.cpp: In function ‘int main()’: user.cpp:15:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&n,&k,&m); ^ user.cpp:18:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&v[i],&a[i]); ^ user.cpp:37:30: warning: ‘vprev’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(nprev<b[i]&&vprev>=v[i]) ^