Compilare: user.cpp: In function ‘int dfs(int)’: user.cpp:12:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<c[nod].size();i++) ^ user.cpp:15:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:18:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,k,z; ^ user.cpp:26:13: warning: unused variable ‘q’ [-Wunused-variable] int q=0; ^ user.cpp:27:15: warning: unused variable ‘nod’ [-Wunused-variable] int nod=1; ^