Eroare de compilare: user.cpp: In function ‘void bf()’: user.cpp:17:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<a[x].size();i++)if(viz[a[x][i]]==0)viz[a[x][i]]=1,tata[a[x][i]]=x,d.push_back(a[x][i]); ^ user.cpp: In function ‘int main()’: user.cpp:34:5: error: ‘w’ was not declared in this scope w[n]=-1,l[n]=1; ^