Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:18:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<V[nod].size(); i++) ~^~~~~~~~~~~~~~ user.cpp: In function ‘void getG()’: user.cpp:49:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<V[vf.el].size(); i++) ~^~~~~~~~~~~~~~~~ user.cpp: In function ‘bool bfs()’: user.cpp:75:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<G[vf].size(); i++) ~^~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:113:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<G[i].size(); j++) ~^~~~~~~~~~~~