Compilare: user.cpp: In function ‘bool dfs(const int&, const int&)’: user.cpp:36:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[s].size(); i++) { ^ user.cpp: In function ‘void afisgraf(const int&)’: user.cpp:66:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[t].size(); i++) ^ user.cpp:70:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<G[nod].size(); j++) { ^ user.cpp: In function ‘int main()’: user.cpp:104:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<G[t].size(); i++) { ^ user.cpp:102:9: warning: unused variable ‘node’ [-Wunused-variable] int node; ^ user.cpp:103:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^