Compilare: user.cpp: In function ‘int bfs()’: user.cpp:26:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++) ^ user.cpp:13:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,nod,nodc; ^ user.cpp: In function ‘void bfs2(int, int*)’: user.cpp:60:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:92:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[n].size();i++) ^ user.cpp:121:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<muchie.size();i++) ^ user.cpp:75:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,z,x,y,flux_curent,nod,nodc,nod1,nod2; ^