Eroare de compilare: user.cpp: In function ‘void solve()’: user.cpp:40:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<q.size(); i++) ^ user.cpp:42:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<a[q[i]].size(); j++) ^ user.cpp: At global scope: user.cpp:59:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:4: /usr/include/c++/4.8/bits/stl_algo.h: In instantiation of ‘_Funct std::for_each(_IIter, _IIter, _Funct) [with _IIter = __gnu_cxx::__normal_iterator<short unsigned int*, std::vector<short unsigned int> >; _Funct = void (*)(int&)]’: user.cpp:63:36: required from here /usr/include/c++/4.8/bits/stl_algo.h:4440:14: error: invalid initialization of reference of type ‘int&’ from expression of type ‘short unsigned int’ __f(*__first); ^