Compilare: user.cpp: In function ‘bool cuplaj(int)’: user.cpp:22:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size(); i ++) ^ user.cpp:31:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size(); i ++) ^