Compilare: user.cpp: In function ‘bool cupleaza(int)’: user.cpp:22:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < G[nod].size(); i++) ^ user.cpp:32:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < G[nod].size(); i++) ^ user.cpp: In function ‘void afisare()’: user.cpp:69:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < G[nod].size(); i++) ^