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()’: user.cpp:69:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<G[i].size(); j++) { ^ user.cpp: In function ‘int main()’: user.cpp:103:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<G[t].size(); i++) { ^ user.cpp:101:9: warning: unused variable ‘node’ [-Wunused-variable] int node; ^ user.cpp:102:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^