Compilare: user.cpp: In function ‘void afis_graph()’: user.cpp:39:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < G[i].size(); j++) ^ user.cpp: In function ‘void comp_conexe()’: user.cpp:129:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k = 0; k < G[nod].size(); k++) ^ user.cpp:142:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < C[i].size(); j++) ^