Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:18:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<arb[nod].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:39:13: warning: variable ‘fx’ set but not used [-Wunused-but-set-variable] int fx=n+1, fy=n+1, fz=n+1, lx=0, ly=0, lz=0, ok=0; ^ user.cpp:39:21: warning: variable ‘fy’ set but not used [-Wunused-but-set-variable] int fx=n+1, fy=n+1, fz=n+1, lx=0, ly=0, lz=0, ok=0; ^ user.cpp:39:29: warning: variable ‘fz’ set but not used [-Wunused-but-set-variable] int fx=n+1, fy=n+1, fz=n+1, lx=0, ly=0, lz=0, ok=0; ^