Compilare: user.cpp: In function ‘int main()’: user.cpp:19:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld%lld",&n,&k); ^ user.cpp:21:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&v[i].creste,&v[i].start); ^ user.cpp:44:9: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(v[i].start+v[i].creste*x<=val){ ^