Compilare: user.cpp: In function ‘int main()’: user.cpp:19:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void DFS(int)’: user.cpp:43:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[p].size();i++){ ^ user.cpp:65:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[p].size();i++){ ^ user.cpp:76:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[p].size();i++){ ^ user.cpp:85:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[p].size();i++){ ^ user.cpp:100:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[p].size();i++){ ^