Compilare: user.cpp: In function ‘bool drum_minim(int, int)’: user.cpp:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[nod].size(); ++i) ~^~~~~~~~~~~~~~ user.cpp: In function ‘bool exista_drum(int, int)’: user.cpp:120:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v[nodc].size(); ++i) ~^~~~~~~~~~~~~~~