Compilare: user.cpp: In function ‘int dfs1(int)’: user.cpp:13:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<graf[nod].size(); i++) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:29:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<graf[nod].size(); i++){ ^ user.cpp:32:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<graf[nod].size(); j++) ^ user.cpp:43:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<graf[nod].size(); i++) if (graf[nod][i].d!=nod) dfs2(graf[nod][i].d); ^ user.cpp:27:22: warning: unused variable ‘nod_aux’ [-Wunused-variable] int i,j,cost,nod_aux; ^