Compilare: user.cpp: In function ‘void DFS_down(int)’: user.cpp:30:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < G[nod].size() ; ++ i){ ^ user.cpp: In function ‘void DFS_up(int)’: user.cpp:57:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < G[nod].size() ; ++ i){ ^ user.cpp:81:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < G[nod].size() ; ++ i){ ^ user.cpp:52:21: warning: variable ‘son_cresc2’ set but not used [-Wunused-but-set-variable] int son_cresc1, son_cresc2; ^ user.cpp:55:20: warning: variable ‘son_desc2’ set but not used [-Wunused-but-set-variable] int son_desc1, son_desc2; ^ user.cpp:90:13: warning: ‘son_desc1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(fiu != son_desc1) ^ user.cpp:85:13: warning: ‘son_cresc1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(fiu != son_cresc1) ^