Compilare: user.cpp: In function ‘void fil(int, int)’: user.cpp:43:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V.size();++i) ~^~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:82:21: warning: ‘dr’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<st<<' '<<dr<<' '<<ras+1; ^~~ user.cpp:82:12: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized] g<<st<<' '<<dr<<' '<<ras+1; ^~~