Compilare: user.cpp: In function ‘int bfs()’: user.cpp:32:19: warning: unused variable ‘j’ [-Wunused-variable] int ok=0,V,i,j; ^ user.cpp: In function ‘int main()’: user.cpp:101:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<sol.size();++i)cout<<sol[i]<<'\n'; ^ user.cpp:52:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,x,y,z; ^