Eroare de compilare: user.cpp: In function ‘void solve()’: user.cpp:33:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<q.size(); i++) ^ user.cpp:35:25: error: ‘a’ was not declared in this scope for (int j=0; j<a[q[i]].size(); j++) ^ user.cpp:38:17: error: ‘d’ was not declared in this scope if (d[x]==-1 || d[q[i]]+1<d[x]) ^ user.cpp: At global scope: user.cpp:47:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^ user.cpp: In function ‘int main()’: user.cpp:51:10: error: ‘d’ was not declared in this scope copy(d.begin()+1,d.end(),ostream_iterator <int> (cout, " ")); ^